UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

For the quarterly period ended June 30, 2018

OR

For the transition period from                      to                     

Commission File Number: 001-12111

MEDNAX, INC.

(Exact name of registrant as specified in its charter)

(954) 384-0175

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

On July 27, 2018, the registrant had outstanding 93,466,848 shares of Common Stock, par value $.01 per share.

MEDNAX, INC.

INDEX

2

PART I - FINANCIAL INFORMATION

MEDNAX, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands)

(Unaudited)

The accompanying notes are an integral part of these Condensed Consolidated Financial Statements.

3

MEDNAX, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(in thousands, except per share data)

(Unaudited)

The accompanying notes are an integral part of these Condensed Consolidated Financial Statements.

4

MEDNAX, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(Unaudited)

The accompanying notes are an integral part of these Condensed Consolidated Financial Statements.

5

MEDNAX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

June 30, 2018

(Unaudited)

The accompanying unaudited Condensed Consolidated Financial Statements of the Company and the notes thereto presented in this Form 10-Q have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) applicable to interim financial statements, and do not include all disclosures required by accounting principles generally accepted in the United States of America (“GAAP”) for complete financial statements. In the opinion of management, these financial statements include all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the results of interim periods. The financial statements include all the accounts of MEDNAX, Inc. and its consolidated subsidiaries (collectively, “MDX”) together with the accounts of MDX’s affiliated business corporations or professional associations, professional corporations, limited liability companies and partnerships (the “affiliated professional contractors”). Certain subsidiaries of MDX have contractual management arrangements with its affiliated professional contractors, which are separate legal entities that provide physician services in certain states and Puerto Rico. The terms “MEDNAX” and the “Company” refer collectively to MEDNAX, Inc., its subsidiaries and the affiliated professional contractors.

The Company is a party to a joint venture in which it owns a 37.5% economic interest. In January 2018, the Company entered into an additional joint venture in which it owns a 49.0% economic interest. The Company accounts for these joint ventures under the equity method of accounting because the Company exercises significant influence over, but does not control, these entities. See Note 5 for more information regarding the January 2018 joint venture.

The consolidated results of operations for the interim periods presented are not necessarily indicative of the results to be experienced for the entire fiscal year. In addition, the accompanying unaudited Condensed Consolidated Financial Statements and the notes thereto should be read in conjunction with the Consolidated Financial Statements and the notes thereto included in the Company’s most recent Annual Report on Form 10-K (the “Form 10-K”).

Recently Adopted Accounting Pronouncements

In May 2014, the accounting guidance related to revenue recognition was amended to outline a single, comprehensive model for accounting for revenue from contracts with customers. The core principle of the new accounting guidance is to require an entity to recognize as revenue the amount that reflects the consideration to which it expects to be entitled in exchange for goods or services as it transfers control to its customers. The guidance became effective for the Company on January 1, 2018 and was adopted on a full retrospective basis. The primary change for healthcare providers under the new guidance is the requirement to report the allowance for uncollectibles associated with patient responsibility amounts as a reduction in net revenue as opposed to bad debt expense, a component of operating expenses. The Company has historically included the allowance for uncollectibles associated with patient responsibility amounts with its allowance for contractual adjustments as a reduction in net revenue as such amounts are not material. Accordingly, the adoption of this guidance did not have an impact on our Consolidated Financial Statements, other than increased financial statement disclosures. The guidance requires increased disclosures, including qualitative and quantitative disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. See Note 4 for more information.

New Accounting Pronouncements

In February 2016, the accounting guidance related to leases was issued that will require an entity to recognize leased assets and the rights and obligations created by those leased assets on the balance sheet and to disclose key information about the entity’s leasing arrangements. This guidance will become effective for the Company on January 1, 2019, with early adoption permitted. The Company expects that the adoption of this guidance will have a material impact on its Consolidated Balance Sheets and related disclosures, resulting from the recognition of significant right of use assets and related liabilities primarily related to its operating lease arrangements for space in hospitals and certain other facilities for its business and medical offices. The Company has completed the review of its existing lease portfolio and is accumulating all of the necessary information required to properly account for leases under the new guidance. The Company has selected a software application, inclusive of a lease administration module and an accounting module, and has begun the implementation process. The Company is in the process of designing workflows, business processes and internal controls surrounding the lease accounting process in order to meet the reporting and disclosure requirements. The Company’s implementation and continued evaluation of this new guidance and its impacts are expected to continue through the third quarter of 2018.

6

As of June 30, 2018 and December 31, 2017, the Company’s cash equivalents consisted entirely of money market funds totaling $2.4 million and $9.2 million, respectively.

Investments consist of municipal debt securities, federal home loan securities and certificates of deposit. Investments with remaining maturities of less than one year are classified as short-term investments. Investments classified as long-term have maturities of one year to six years.

The Company intends and has the ability to hold its securities to maturity, and therefore carries such investments at amortized cost in accordance with the provisions of the accounting guidance for investments in debt and equity securities.

Investments held at June 30, 2018 and December 31, 2017 are summarized as follows (in thousands):

Contractual maturities of long-term investments are summarized as follows (in thousands):

In accordance with the accounting guidance for fair value measurements and disclosures, the Company carries its money market funds included in cash and cash equivalents at fair value. In accordance with the three-tier fair value hierarchy under this guidance, the Company determined the fair value using quoted market prices, a Level 1 input as defined under the accounting guidance for fair value measurements. At June 30, 2018 and December 31, 2017, the Company’s money market funds had a carrying amount of $2.4 million and $9.2 million, respectively.

The Company also carries the cash surrender value of life insurance related to its deferred compensation arrangements at fair value. The investments underlying the life insurance contracts consist primarily of exchange-traded equity securities and mutual funds with quoted prices in active markets. In accordance with the three-tier fair value hierarchy, the Company determined the fair value using the cash surrender value of the life insurance, a Level 2 input as defined under the accounting guidance for fair value measurements. At June 30, 2018 and December 31, 2017, the Company’s cash surrender value of life insurance had a carrying amount of $15.7 million and $15.6 million, respectively.

In addition, the Company carries its contingent consideration liabilities related to acquisitions at fair value. In accordance with the three-tier fair value hierarchy, the Company determined the fair value of its contingent consideration liabilities using the income approach with assumed discount rates and payment probabilities. The income approach uses Level 3, or unobservable inputs as defined under the accounting guidance for fair value measurements. At June 30, 2018 and December 31, 2017, the Company’s contingent consideration liabilities had a fair value of $30.7 million and $30.5 million, respectively.

The carrying amounts of cash equivalents, short-term investments, accounts receivable and accounts payable and accrued expenses approximate fair value due to the short maturities of the respective instruments. The carrying values of long-term investments, line of credit and capital lease obligations approximate fair value. If the Company’s investments were measured at fair value, they would be categorized as Level 2 in the fair value hierarchy. If the Company’s line of credit was measured at fair value, it would be categorized as Level 2 in the fair value hierarchy. The estimated fair value of the Company’s 5.25% senior unsecured notes due 2023 was $735.0 million and $763.1 million, at June 30, 2018 and December 31, 2017, respectively, and was estimated using trading prices on such dates as Level 2 inputs to estimate fair value.

7

Accounts receivable, net consists of the following (in thousands):

Patient service revenue is recognized at the time services are provided by the Company’s affiliated physicians. The Company’s performance obligations related to the delivery of services to patients are satisfied at the time of service. Accordingly, there are no performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period with respect to patient service revenue. Almost all of the Company’s patient service revenue is reimbursed by government-sponsored healthcare programs and third-party insurance payors. Payments for services rendered to the Company’s patients are generally less than billed charges. The Company monitors its revenue and receivables from these sources and records an estimated contractual allowance to properly account for the anticipated differences between billed and reimbursed amounts.

Accordingly, patient service revenue is presented net of an estimated provision for contractual adjustments and uncollectibles. The Company estimates allowances for contractual adjustments and uncollectibles on accounts receivable based upon historical experience and other factors, including days sales outstanding (“DSO”) for accounts receivable, evaluation of expected adjustments and delinquency rates, past adjustments and collection experience in relation to amounts billed, an aging of accounts receivable, current contract and reimbursement terms, changes in payor mix and other relevant information. Contractual adjustments result from the difference between the physician rates for services performed and the reimbursements by government-sponsored healthcare programs and third-party insurance payors for such services.

Collection of patient service revenue the Company expects to receive is normally a function of providing complete and correct billing information to the government-sponsored healthcare programs and third-party insurance payors within the various filing deadlines and typically occurs within 30 to 60 days of billing.

Some of the Company’s hospital agreements require hospitals to pay the Company administrative fees. Some agreements provide for fees if the hospital does not generate sufficient patient volume in order to guarantee that the Company receives a specified minimum revenue level. The Company also receives fees from hospitals for administrative services performed by its affiliated physicians providing medical director or other services at the hospital.

In addition, the Company generates revenue through its management services organization for services rendered under various coding and billing contracts. Contract terms are specific to each customer and may include a combination of a flat fee for coding of medical charts, a fixed fee per patient visit as well as a percentage of cash collections received by the providers. Revenue for flat and fixed fee arrangements is recognized in the month the coding occurs or the patient visit occurs. Revenue for percentage fees are recognized in the month that cash is collected for customers from payors.

The following table summarizes the Company’s net revenue by category (in thousands):

8

The approximate percentage of net patient service revenue by type of payor was as follows:

During the six months ended June 30, 2018, the Company completed the acquisition of five physician group practices, including two radiology practices, one neonatology practice and two pediatric subspecialty practices. The acquisition-date fair value of the total consideration for the five acquisitions was $24.4 million. These acquisitions expanded the Company’s national network of physician practices. In connection with these acquisitions, the Company recorded goodwill of $15.5 million and other intangible assets consisting primarily of physician and hospital agreements of $8.9 million.

In addition, during the six months ended June 30, 2018, in connection with certain prior-period acquisitions, the Company paid $0.4 million for contingent consideration and $1.2 million for purchase consideration that had been held back pending satisfaction of certain conditions. All amounts except for the accretion recorded during 2018 were accrued as of December 31, 2017.

In connection with certain prior-period acquisitions, the Company also recorded a decrease in current assets of $1.2 million, a decrease in noncurrent assets of $1.5 million, an increase in current liabilities of $1.4 million and an increase in noncurrent liabilities of $1.2 million, with a corresponding net increase in goodwill of $5.3 million for measurement-period adjustments resulting from the finalization of acquisition accounting. The Company expects that $18.2 million of the goodwill recorded during the six months ended June 30, 2018 will be deductible for tax purposes.

In January 2018, the Company completed the sale of a controlling interest and the contribution of remaining assets to a joint venture related to the $46.0 million of assets held for sale at December 31, 2017. The Company accounts for its 49.0% economic interest in the joint venture as an equity method investment. The investment in this joint venture is included in other assets as presented in the Company’s Condensed Consolidated Balance Sheet.

The Company’s management services reporting unit has experienced lower operating results than previously forecasted primarily due to a slower rate of new customer bookings and an increase in customer termination activity. The Company continues to believe that the fair value of the reporting unit exceeds the carrying value, and accordingly the goodwill assigned to the management services reporting unit is not impaired Although the Company believes that the current assumptions and estimates used in its goodwill analysis are reasonable, supportable and appropriate, continued efforts to maintain or improve the performance of this business could be impacted by unfavorable or unforeseen changes which could impact the existing assumptions used in the impairment analysis. Various factors could reasonably be expected to unfavorably impact existing assumptions, primarily delays in new customer bookings and the related delay in revenue from new customers, increases in customer termination activity or increases in operating costs. Accordingly, there can be no assurance that the estimates and assumptions made for the purposes of the goodwill impairment analysis will prove to be accurate predictions of future performance. The carrying value of the Company’s management services reporting unit included goodwill of $321.6 million as of June 30, 2018. The Company will continue to closely monitor the performance of the management services reporting unit. If an impairment loss is required in a future period, it could have a material adverse effect on the Company’s business, financial condition, results of operations, cash flows and the trading price of the Company’s securities.

9

Accounts payable and accrued expenses consist of the following (in thousands):

The net decrease in accrued salaries and bonuses of $80.5 million from December 31, 2017 to June 30, 2018 is primarily due to the payment of performance-based incentive compensation, principally to the Company’s physicians, partially offset by performance-based incentive compensation accrued during the six months ended June 30, 2018. A majority of the Company’s payments for performance-based incentive compensation is paid annually during the first quarter.

Basic net income per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per common share is calculated by dividing net income by the weighted average number of common and potential common shares outstanding during the period. Potential common shares consist of outstanding restricted stock, deferred stock and stock options and is calculated using the treasury stock method.

The calculation of shares used in the basic and diluted net income per common share calculation for the three and six months ended June 30, 2018 and 2017 is as follows (in thousands):

The Company’s Amended and Restated 2008 Incentive Compensation Plan, as amended (the “Amended and Restated 2008 Incentive Plan”) provides for grants of stock options, stock appreciation rights, restricted stock, deferred stock, and other stock-related awards and performance awards that may be settled in cash, stock or other property.

Under the Amended and Restated 2008 Incentive Plan, options to purchase shares of common stock may be granted at a price not less than the fair market value of the shares on the date of grant. The options must be exercised within 10 years from the date of grant and generally become exercisable on a pro rata basis over a three-year period from the date of grant. The Company issues new shares of its common stock upon exercise of its stock options. Restricted stock awards generally vest over periods of three years upon the fulfillment of specified service-based conditions and in certain instances performance-based conditions. Deferred stock awards generally vest upon the satisfaction of specified performance-based conditions and service-based conditions. The Company recognizes compensation expense related to its restricted stock and deferred stock awards ratably over the corresponding vesting periods. During the six months ended June 30, 2018, the Company granted 597,550 shares of restricted stock to its employees and non-employee directors under the Amended and Restated 2008 Incentive Plan. At June 30, 2018, the Company had 2.3 million shares available for future grants and awards under its Amended and Restated 2008 Incentive Plan.

Under the Company’s 1996 Non-Qualified Employee Stock Purchase Plan, as amended (the “ESPP”), employees are permitted to purchase the Company’s common stock at 85% of market value on January 1st, April 1st, July 1st and October 1st of each year. Under the Company’s 2015 Non-Qualified Stock Purchase Plan (the “SPP”), certain eligible non-employee service providers are permitted to purchase the Company’s common stock at 90% of market value on January 1st, April 1st, July 1st and October 1st of each year.

10

Each of the ESPP and the SPP provide for the issuance of an aggregate of 2.6 million shares of the Company’s common stock less the number of shares of common stock purchased under the other plan. The Company recognizes stock-based compensation expense for the discount received by participating employees and non-employee service providers. During the six months ended June 30, 2018, 182,888 shares in aggregate were issued under the ESPP and SPP. At June 30, 2018, the Company had approximately 1.8 million shares in aggregate reserved for issuance under the ESPP and SPP.

During the three and six months ended June 30, 2018 and 2017, the Company recognized stock-based compensation expense of $10.5 million and $20.4 million, and $7.3 million and $14.8 million, respectively.

In July 2013, the Company’s Board of Directors authorized the repurchase of shares of the Company’s common stock up to an amount sufficient to offset the dilutive impact from the issuance of shares under the Company’s equity compensation programs. The share repurchase program allows the Company to make open market purchases from time-to-time based on general economic and market conditions and trading restrictions. The repurchase program also allows for the repurchase of shares of the Company’s common stock to offset the dilutive impact from the issuance of shares, if any, related to the Company’s acquisition program. During the six months ended June 30, 2018, the Company repurchased 1.2 million shares of its common stock for $52.2 million, inclusive of 54,909 shares withheld to satisfy minimum statutory withholding obligations of $2.5 million in connection with the vesting of restricted stock and stock option exercises during the three months ended June 30, 2018. The shares repurchased by the Company during the second quarter of 2018 completed the repurchases under the program with respect to issuances of shares under the Company’s equity compensation programs during 2018. The Company intends to utilize various methods to effect any future share repurchases, including, among others, open market purchases and accelerated share repurchase programs. The amount and timing of repurchases will depend upon several factors, including general economic and market conditions and trading restrictions.

The Company expects that audits, inquiries and investigations from government authorities and agencies will occur in the ordinary course of business. Such audits, inquiries and investigations and their ultimate resolutions, individually or in the aggregate, could have a material adverse effect on the Company’s business, financial condition, results of operations, cash flows and the trading price of its securities. The Company has not included an accrual for these matters as of June 30, 2018 in its Condensed Consolidated Financial Statements, as the variables affecting any potential eventual liability depend on the currently unknown facts and circumstances that arise out of, and are specific to, any particular future audit, inquiry and investigation and cannot be reasonably estimated at this time.

In the ordinary course of business, the Company becomes involved in pending and threatened legal actions and proceedings, most of which involve claims of medical malpractice related to medical services provided by the Company’s affiliated physicians. The Company’s contracts with hospitals generally require the Company to indemnify them and their affiliates for losses resulting from the negligence of the Company’s affiliated physicians. The Company may also become subject to other lawsuits which could involve large claims and significant costs. The Company believes, based upon a review of pending actions and proceedings, that the outcome of such legal actions and proceedings will not have a material adverse effect on its business, financial condition, results of operations, cash flows and the trading price of its securities. The outcome of such actions and proceedings, however, cannot be predicted with certainty and an unfavorable resolution of one or more of them could have a material adverse effect on the Company’s business, financial condition, results of operations, cash flows and the trading price of its securities.

Although the Company currently maintains liability insurance coverage intended to cover professional liability and certain other claims, the Company cannot assure that its insurance coverage will be adequate to cover liabilities arising out of claims asserted against it in the future where the outcomes of such claims are unfavorable. With respect to professional liability risk, the Company generally self-insures a portion of this risk through its wholly owned captive insurance subsidiary. Liabilities in excess of the Company’s insurance coverage, including coverage for professional liability and certain other claims, could have a material adverse effect on the Company’s business, financial condition, results of operations, cash flows and the trading price of its securities.

11

The following discussion highlights the principal factors that have affected our financial condition and results of operations, as well as our liquidity and capital resources, for the periods described. This discussion should be read in conjunction with the unaudited Condensed Consolidated Financial Statements and the notes thereto included in this Quarterly Report. In addition, reference is made to our audited consolidated financial statements and notes thereto and related Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our most recent Annual Report on Form 10-K. As used in this Quarterly Report, the terms “MEDNAX”, the “Company”, “we”, “us” and “our” refer to the parent company, MEDNAX, Inc., a Florida corporation, and the consolidated subsidiaries through which its businesses are actually conducted (collectively, “MDX”), together with MDX’s affiliated business corporations or professional associations, professional corporations, limited liability companies and partnerships (“affiliated professional contractors”). Certain subsidiaries of MDX have contracts with our affiliated professional contractors, which are separate legal entities that provide physician services in certain states and Puerto Rico. The following discussion contains forward-looking statements. Please see the Company’s most recent Annual Report on Form 10-K, including Item 1A, Risk Factors, for a discussion of the uncertainties, risks and assumptions associated with these forward-looking statements. In addition, please see “Caution Concerning Forward-Looking Statements” below.

Overview

MEDNAX is a leading provider of physician services including newborn, anesthesia, maternal-fetal, radiology and teleradiology, pediatric cardiology and other pediatric subspecialty care. Our national network is comprised of affiliated physicians who provide clinical care in 39 states and Puerto Rico. Our affiliated physicians provide neonatal clinical care, primarily within hospital-based neonatal intensive care units, to babies born prematurely or with medical complications; anesthesia care to patients in connection with surgical and other procedures, as well as pain management; radiology services including diagnostic imaging and interventional radiology; and maternal-fetal and obstetrical medical care to expectant mothers experiencing complicated pregnancies primarily in areas where our affiliated neonatal physicians practice. Our network also includes other pediatric subspecialists, including those who provide pediatric intensive care, pediatric cardiology care, hospital-based pediatric care, pediatric surgical care, pediatric ear, nose and throat, pediatric ophthalmology and pediatric urology services. MEDNAX also provides teleradiology services in all 50 states, the District of Columbia and Puerto Rico through a network of affiliated radiologists. In addition to our national physician network, we provide services nationwide to healthcare facilities and physicians, including ours, through complementary businesses, consisting of a management services organization focusing on full-service revenue cycle management and a consulting services company.

2018 Acquisition Activity

During the six months ended June 30, 2018, we completed the acquisitions of five physician group practices, including two radiology practices, one neonatology practice and two pediatric subspecialty practices. Based on our experience, we expect that we can improve the results of all of our acquired physician practices through improved managed care contracting, improved collections, identification of growth initiatives, as well as, operating and cost savings based upon the significant infrastructure that we have developed. In addition, we believe that we bring a unique value proposition to radiology physician groups, in that we can provide not only practice support, but also teleradiology capabilities that can enhance a physician group’s efficiency, provide subspecialty access and help them grow and remain competitive. We believe that radiology physician group practice physicians can complement the staffing needs for our teleradiology services business during certain times, such as nights and weekends, when the group practice physicians are not providing services at their practices. Our results of operations for the three and six months ended June 30, 2018 include the results for these five acquisitions from their respective dates of acquisition and therefore are not comparable in some respects to our results of operations for prior periods.

Corporate and Operational Initiatives

We have developed a number of strategic initiatives across our organization, in both our corporate functions and our operational infrastructure, with a goal of generating improvements in our general and administrative expenses and improvements through operational plans. In our corporate departments, we are focused on best-in-class cost and service excellence in order to improve processes, use our resources more efficiently and utilize our scale more effectively in all areas of our operations. Within our operational infrastructure, we have developed specific operational plans within each of our service lines and affiliated physician practices, with specific milestones and regular reporting, with the goal of generating long-term operational improvements and fostering even greater collaboration across our national medical group. We are targeting annualized financial improvements related to these initiatives of $40 million within general and administrative expenses and $80 million in operational improvements by the end of 2019, although there is no assurance that these improvements will be obtained. We believe these strategic initiatives, together with our continued plans to invest in focused, targeted and strategic organic and acquisitive growth, position us well to deliver a differentiated value proposition to our stakeholders while continuing to provide the highest quality care for our patients.

12

Common Stock Repurchase Program

In July 2013, our board of directors authorized the repurchase of shares of our common stock up to an amount sufficient to offset the dilutive impact from the issuance of shares under our equity compensation programs. The share repurchase program allows us to make open market purchases from time-to-time based on general economic and market conditions and trading restrictions. The repurchase program also allows for the repurchase of shares of our common stock to offset the dilutive impact from the issuance of shares, if any, related to our acquisition program. During the six months ended June 30, 2018, we repurchased 1.2 million shares of our common stock for $52.2 million, inclusive of 54,909 shares withheld to satisfy minimum statutory withholding obligations of $2.5 million in connection with the vesting of restricted stock and exercises of stock options during the three months ended June 30, 2018. The shares repurchased by us during the second quarter of 2018 completed the repurchases under the repurchase program with respect to issuances of shares under our equity compensation programs during 2018.

On August 2, 2018, we announced that our board of directors had authorized the repurchase of up to $500.0 million of shares of our common stock in addition to our existing share repurchase program. We intend to commence repurchases under this program in the near term.

We may utilize various methods to effect any future share repurchases, including, among others, open market purchases and accelerated share repurchase programs. The amount and timing of repurchases will depend upon several factors, including general economic and market conditions and trading restrictions.

General Economic Conditions and Other Factors

Our operations and performance depend significantly on economic conditions. During the three months ended June 30, 2018, the percentage of our patient service revenue being reimbursed under government-sponsored or funded healthcare programs (the “GHC Programs”), decreased as compared to the three months ended March 31, 2018 but increased as compared to the three months ended June 30, 2017. We could experience shifts toward GHC Programs and patient volumes could decline if economic conditions deteriorate or changes occur in population demographics within geographic locations in which we provide services. Payments received from GHC Programs are substantially less for equivalent services than payments received from commercial insurance payors. In addition, due to the rising costs of managed care premiums and patient responsibility amounts, we may experience lower net revenue resulting from increased bad debt due to patients’ inability to pay for certain services.

Healthcare Reform

The Patient Protection and Affordable Care Act (the “ACA”) contains a number of provisions that have affected us and, absent amendment or repeal, may continue to affect us over the next several years. These provisions include the establishment of health insurance exchanges to facilitate the purchase of qualified health plans, expanded Medicaid eligibility, subsidized insurance premiums and additional requirements and incentives for businesses to provide healthcare benefits. Other provisions have expanded the scope and reach of the Federal Civil False Claims Act (“FCA”) and other healthcare fraud and abuse laws. Moreover, we could be affected by potential changes to various aspects of the ACA, including subsidies, healthcare insurance marketplaces and Medicaid expansion.

The ACA remains subject to continuing legislative and administrative scrutiny, including efforts by the Republican-controlled Congress and the current Administration to amend or repeal a number of its provisions, as well as administrative actions delaying the effectiveness of key provisions. At the end of 2017, Congress repealed part of the ACA that required most individuals to purchase and maintain health insurance. If the ACA is repealed or further substantially modified, or if implementation of certain aspects of the ACA are diluted or delayed, such repeal, modification or delay may impact our business, financial condition, results of operations, cash flows and the trading price of our securities. We are unable to predict the impact of any repeal, modification or delay in the implementation of the ACA, including the repeal of the individual mandate, on us at this time.

In addition to the potential impacts to the ACA under the current Administration, there could be more sweeping changes to GHC Programs, such as a change in the structure of Medicaid by converting it into a block grant or instituting “per capita caps,” which could eliminate the guarantee that everyone who is eligible and applies for benefits would receive them and could potentially give states sweeping new authority to restrict eligibility, cut benefits and make it more difficult for people to enroll. Additionally, several states are considering and pursuing changes to their Medicaid programs, such as requiring recipients to engage in employment activities as a condition of eligibility for most adults, disenrolling recipients for failure to pay a premium, or adjusting premium amounts based on income.

As a result, we cannot predict with any assurance the ultimate effect of these laws and resulting changes to payments under GHC Programs, nor can we provide any assurance that they will not have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our securities. Further, any fiscal tightening impacting GHC Programs or changes to the structure of any GHC Programs could have a material adverse effect on our financial condition, results of operations, cash flows and the trading price of our securities.

13

The Medicare Access and CHIP Reauthorization Act

Medicare pays for most physician services based upon a national service-specific fee schedule. In 2015, Congress enacted the Medicare Access and CHIP Reauthorization Act (“MACRA,”) which provides physicians 0.5% annual increases in reimbursement through 2019 as Medicare transitions to a payment system designed to reward physicians for the quality of care provided, rather than the quantity of procedures performed. MACRA will require physicians to choose to participate in one of two payment formulas, Merit-Based Incentive Payment System (“MIPS”) or Alternative Payment Models (“APMs”). Beginning in 2019, MIPS will allow eligible physicians to receive incentive payments based on the achievement of certain quality and cost metrics, among other measures, and be reduced for those who are underperforming against those same metrics and measures. As an alternative, physicians can choose to participate in an Advanced APM. Advanced APMs are exempt from the MIPS requirements, and physicians who are meaningful participants in APMs will receive bonus payments from Medicare pursuant to the law. We currently anticipate that our affiliated physicians will be eligible to receive bonus payments in 2019 through participation in the MIPS, although the amounts of such bonus payments are not expected to be material. We will continue to operationalize the provisions of MACRA and assess any further changes to the law or additional regulations enacted pursuant to the law.

We cannot predict the ultimate effect that these changes will have on us, nor can we provide any assurance that its provisions will not have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our securities.

Medicaid Expansion

The ACA also allows states to expand their Medicaid programs through federal payments that fund most of the cost of increasing the Medicaid eligibility income limit from a state’s historic eligibility levels to 133% of the federal poverty level. To date, 32 states and the District of Columbia have expanded Medicaid eligibility to cover this additional low income patient population, and other states are considering expansion. All of the states in which we operate, however, already cover children in the first year of life and pregnant women if their household income is at or below 133% of the federal poverty level.

Medicare Sequestration

The Budget Control Act of 2011, as amended by the American Taxpayer Relief Act of 2012, required across-the-board cuts (“sequestrations”) to Medicare reimbursement rates. These annual reductions of 2%, on average, apply to mandatory and discretionary spending through 2025. Unless Congress takes action in the future to modify these sequestrations, Medicare reimbursements will be reduced by 2%, on average, annually. However, this reduction in Medicare reimbursement rates is not expected to have a material adverse effect on our business, financial condition, results of operations, cash flows or the trading price of our securities.

Non-GAAP Measures

In our analysis of our results of operations, we use certain non-GAAP financial measures. Earnings before interest, taxes and depreciation and amortization (“EBITDA”) consists of net income before interest expense, income tax provision and depreciation and amortization. Prior to the fourth quarter of 2017, the Company had included immaterial investment and other income and equity in earnings of unconsolidated affiliates as a component of the interest expense adjustment within EBITDA. Beginning with the fourth quarter of 2017, the Company began excluding these items such that the interest expense adjustment represents only interest expense and has conformed its historical EBITDA calculations with the current presentation. Adjusted earnings per common share (“Adjusted EPS”) consists of diluted net income per common and common equivalent share adjusted for amortization expense and stock-based compensation expense.

We believe these measures, in addition to income from operations, net income and diluted net income per common and common equivalent share, provide investors with useful supplemental information to compare and understand our underlying business trends and performance across reporting periods on a consistent basis. These measures should be considered a supplement to, and not a substitute for, financial performance measures determined in accordance with GAAP. In addition, since these non-GAAP measures are not determined in accordance with GAAP, they are susceptible to varying calculations and may not be comparable to other similarly titled measures of other companies.

For a reconciliation of each of EBITDA and Adjusted EPS to the most directly comparable GAAP measures for the three and six months ended June 30, 2018 and 2017, refer to the tables below (in thousands, except per share data). In addition, historical reconciliations of EBITDA and Adjusted EPS are available on our Internet website at www.mednax.com under the Investors tab. Our Internet website and the information contained therein or connected thereto are not incorporated into or deemed a part of this Form 10-Q.

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Results of Operations

Three Months Ended June 30, 2018 as Compared to Three Months Ended June 30, 2017

Our net revenue increased $73.0 million, or 8.7%, to $915.9 million for the three months ended June 30, 2018, as compared to $842.9 million for the same period in 2017. Of this $73.0 million increase, $46.7 million, or 5.5%, was attributable to revenue generated from acquisitions completed after March 31, 2017 and 26.3 million, or 3.2%, was attributable to an increase in same-unit net revenue. Same units are those units at which we provided services for the entire current period and the entire comparable period. The increase in same-unit net revenue was comprised of an increase of $15.5 million, or 1.9%, related to patient service volumes and a net increase of $10.8 million, or 1.3%, from net reimbursement-related factors. The increase in revenue of $15.5 million from patient service volumes was related to growth across all of our services. The net increase in revenue of $10.8 million related to net reimbursement-related factors was primarily due to modest improvements in managed care contracting and an increase in the administrative fees received from our hospital partners, partially offset by a decrease in revenue caused by an increase in the percentage of our patients enrolled in GHC Programs.    

Practice salaries and benefits increased $59.6 million, or 10.6%, to $621.0 million for the three months ended June 30, 2018, as compared to $561.4 million for the same period in 2017. This $59.6 million increase was primarily attributable to increased costs associated with physicians and other staff to support organic-growth initiatives, acquisition-related growth and growth at our existing units, of which $50.2 million was related to salaries and $9.4 million was related to benefits and incentive compensation. We anticipate that we will continue to experience a higher rate of growth in clinician compensation expense at our existing units over historic averages, which could adversely affect our business, financial condition, results of operations, cash flows and the trading price of our securities. We anticipate that practice salaries and benefits expense for the third and fourth quarters of 2018 will continue to include salaries and benefit costs for certain physicians who will remain employed through December 31, 2018 despite the non-renewal of an anesthesia services contract by one of our hospital partners effective July 1, 2018, under which they had previously provided services.

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Practice supplies and other operating expenses increased $0.9 million, or 3.1%, to $31.8 million for the three months ended June 30, 2018, as compared to $30.9 million for the same period in 2017. The increase was primarily attributable to practice supply, rent and other costs related to our acquisitions, partially offset by decreases at our existing units.

General and administrative expenses include all billing and collection functions and all other salaries, benefits, supplies and operating expenses not specifically related to the day-to-day operations of our physician practices and services, as well as those attributable to our non-physician service businesses. General and administrative expenses increased $4.9 million, or 4.8%, to $107.9 million for the three months ended June 30, 2018, as compared to $103.0 million for the same period in 2017. The increase of $4.9 million is attributable to the overall growth of the Company. Included within general and administrative expenses was an increase of $3.2 million of stock-based compensation expense primarily resulting from the change in timing of our annual equity grants from June to March in order to align the timing with other compensation related activities and a decrease of approximately $6.0 million in cost improvement as part of our corporate initiative. General and administrative expenses as a percentage of net revenue was 11.8% for the three months ended June 30, 2018, as compared to 12.2% for the same period in 2017.

Depreciation and amortization expense increased $0.8 million, or 3.0%, to $26.5 million for the three months ended June 30, 2018, as compared to $25.7 million for the same period in 2017. The increase was primarily attributable to the amortization of intangible assets related to acquisitions.

Income from operations increased $6.8 million, or 5.6%, to $128.7 million for the three months ended June 30, 2018, as compared to $121.9 million for the same period in 2017. Our operating margin was 14.1% for the three months ended June 30, 2018, as compared to 14.5% for the same period in 2017. The decrease of 41 basis points was primarily due to higher operating expense growth as compared to revenue growth.

Net non-operating expenses were $19.1 million for the three months ended June 30, 2018, as compared to $17.5 million for the same period in 2017. The net increase in non-operating expenses was primarily related to an increase in interest expense due to higher average interest rates on higher outstanding borrowings under our credit agreement (the “Credit Agreement”).

Our effective income tax rate was 27.5% and 39.0% for the three months ended June 30, 2018 and 2017, respectively. The decrease in our effective tax rate is primarily related to the reduction in the corporate tax rate enacted under the Tax Cuts and Jobs Act of 2017.    

Net income was $79.4 million for the three months ended June 30, 2018, as compared to $63.7 million for the same period in 2017. EBITDA was $157.7 million for the three months ended June 30, 2018, as compared to $148.7 million for the same period in 2017.

Diluted net income per common and common equivalent share was $0.85 on weighted average shares outstanding of 93.5 million for the three months ended June 30, 2018, as compared to $0.69 on weighted average shares outstanding of 92.8 million for the same period in 2017. Adjusted EPS was $1.07 for the three months ended June 30, 2018, as compared to $0.85 for the same period in 2017.

Six Months Ended June 30, 2018 as Compared to Six Months Ended June 30, 2017

Our net revenue increased $139.2 million, or 8.3%, to $1.82 billion for the six months ended June 30, 2018, as compared to $1.68 billion for the same period in 2017. Of this $139.2 million increase, $84.6 million, or 4.9%, was attributable to revenue generated from acquisitions completed after December 31, 2016 and $54.6 million, or 3.4%, was attributable to an increase in same-unit net revenue. Same units are those units at which we provided services for the entire current period and the entire comparable period. The increase in same-unit net revenue was comprised of a net increase of $28.7 million, or 1.8%, related to patient service volumes and an increase of $25.9 million, or 1.6%, from net reimbursement-related factors. The increase in revenue of $28.7 million from patient service volumes was related to growth across almost all of our services. The net increase in revenue of $25.9 million related to net reimbursement-related factors was primarily due to modest improvements in managed care contracting and an increase in the administrative fees received from our hospital partners, partially offset by a decrease in revenue caused by an increase in the percentage of our patients enrolled in GHC Programs.

Practice salaries and benefits increased $119.0 million, or 10.5%, to $1.25 billion for the six months ended June 30, 2018, as compared to $1.13 billion for the same period in 2017. This $119.0 million increase was primarily attributable to increased costs associated with physicians and other staff primarily to support organic-growth initiatives, acquisition-related growth and growth at our existing units, of which $96.9 million was related to salaries and $22.1 million was related to benefits and incentive compensation. We anticipate that we will continue to experience a higher rate of growth in compensation expense at our existing units over historic averages, which could adversely affect our business, financial condition, results of operations, cash flows and the trading price of our securities. We anticipate that practice salaries and benefits expense for the third and fourth quarters of 2018 will continue to include salaries and benefit costs for certain physicians who will remain employed through December 31, 2018 despite the non-renewal of an anesthesia services contract with one of our hospital partners effective July 1, 2018, under which they had previously provided services.

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Practice supplies and other operating expenses increased $3.8 million, or 6.5%, to $62.5 million for the six months ended June 30, 2018, as compared to $58.7 million for the same period in 2017. The increase was primarily attributable to practice supply, rent and other costs related to our acquisitions, partially offset by decrease at our existing units.

General and administrative expenses include all billing and collection functions and all other salaries, benefits, supplies and operating expenses not specifically related to the day-to-day operations of our physician practices and services, as well as those attributable to our non-physician service businesses. General and administrative expenses increased $9.9 million, or 4.8%, to $216.7 million for the six months ended June 30, 2018, as compared to $206.8 million for the same period in 2017. The net increase of $9.9 million is attributable to the overall growth of the Company, including growth from acquisitions. Included within general and administrative expenses was an increase of $5.4 million of stock-based compensation expense primarily resulting from the change in timing of our annual equity grants from June to March in order to align the timing with other compensation related activities and a decrease of $12.0 million in cost improvement as part of our corporate initiative. General and administrative expenses as a percentage of net revenue was 11.9% for the six months ended June 30, 2018, as compared to 12.3% for the same period in 2017.

Depreciation and amortization expense increased $1.4 million, or 2.6%, to $52.7 million for the six months ended June 30, 2018, as compared to $51.3 million for the same period in 2017. The increase was primarily attributable to the amortization of intangible assets related to acquisitions.

Income from operations increased $5.2 million, or 2.3%, to $233.1 million for the six months ended June 30, 2018, as compared to $227.9 million for the same period in 2017. Our operating margin was 12.8% for the six months ended June 30, 2018, as compared to 13.6% for the same period in 2017. The decrease of 76 basis points was due to higher operating expense growth as compared to revenue growth.

Net non-operating expenses were $36.1 million for the six months ended June 30, 2018, as compared to $33.9 million for the same period in 2018. The net increase in non-operating expenses was primarily related to an increase in interest expense due to higher average interest rates on higher outstanding borrowings under our Credit Agreement.

Our effective income tax rate was 27.5% and 39.0% for the six months ended June 30, 2018 and 2017, respectively. The decrease in our effective tax rate is primarily related to the reduction in the corporate tax rate enacted under the Tax Cuts and Jobs Act of 2017.    

Net income was $142.8 million for the six months ended June 30, 2018, as compared to $118.4 million for the same period in 2017. EBITDA was $291.2 million for the six months ended June 30, 2018, as compared to $281.7 million for the same period in 2017.

Diluted net income per common and common equivalent share was $1.53 on weighted average shares outstanding of 93.5 million for the six months ended June 30, 2018, as compared to $1.27 on weighted average shares outstanding of 93.0 million for the same period in 2017. Adjusted EPS was $1.96 for the six months ended June 30, 2018, as compared to $1.60 for the same period in 2017.

Liquidity and Capital Resources

As of June 30, 2018, we had $38.1 million of cash and cash equivalents on hand as compared to $60.2 million at December 31, 2017. Additionally, we had working capital of $213.7 million at June 30, 2018, an increase of $117.9 million from working capital of $95.8 million at December 31, 2017. This net increase in working capital is primarily due to year-to-date earnings and net borrowings on our Credit Agreement, partially offset by the use of funds for repurchases of our common stock and acquisitions.

Cash Flows

Cash provided by (used in) operating, investing and financing activities is summarized as follows (in thousands):

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Operating Activities

During the six months ended June 30, 2018, our net cash provided from operating activities was $21.6 million, compared to $115.8 million for the same period in 2017. The net decrease in cash provided of $94.2 million was primarily due to increases in accounts receivable, a decrease in cash flow from income taxes resulting from tax payments made in the first quarter of 2018 for 2017 taxes that were deferred by the Internal Revenue Service for companies impacted by the 2017 hurricanes, partially offset by an increase in cash flow related to higher earnings.

During the six months ended June 30, 2018, cash flow from accounts receivable decreased by $24.0 million, as compared to an increase of $18.4 million for the same period in 2017. The decrease in cash flow from accounts receivable for the six months ended June 30, 2018 was primarily due to increased ending accounts receivable balances at existing units resulting from higher same-unit revenue.

Days sales outstanding (“DSO”) is one of the key factors that we use to evaluate the condition of our accounts receivable and the related allowances for contractual adjustments and uncollectibles. DSO reflects the timeliness of cash collections on billed revenue and the level of reserves on outstanding accounts receivable. Our DSO was 52.5 days at June 30, 2018 as compared to 50.9 days at December 31, 2017. The increase in our DSO primarily related to the increases in our accounts receivable balances at existing units.

Investing Activities

During the six months ended June 30, 2018, our net cash used in investing activities of $39.0 million primarily included capital expenditures of $26.3 million, acquisition payments of $25.6 million and net purchases of $9.9 million related to the purchase and maturity of investments, partially offset by proceeds of $22.8 million related to the sale of the controlling interest in a group of assets to a third party.

Financing Activities

During the six months ended June 30, 2018, our net cash used in financing activities of $4.8 million consisted primarily of the repurchase of $52.2 million of our common stock, partially offset by net borrowings on our Credit Agreement of $39.0 million and proceeds of $9.4 million from the exercise of employee stock options and the issuance of common stock under our 1996 Non-Qualified Employee Stock Purchase Plan, as amended, and 2015 Non-Qualified Stock Purchase Plan.

Liquidity

Our Credit Agreement provides for a $2.0 billion unsecured revolving credit facility and includes a $37.5 million sub-facility for the issuance of letters of credit. The Credit Agreement matures on October 31, 2022 and is guaranteed by substantially all of our subsidiaries and affiliated professional contractors. At our option, borrowings under the Credit Agreement will bear interest at (i) the alternate base rate (defined as the higher of (a) the prime rate, (b) the Federal Funds Rate plus 1/2 of 1.00% and (c) LIBOR for an interest period of one month plus 1.00%) plus an applicable margin rate ranging from 0.125% to 0.750% based on our consolidated leverage ratio or (ii) the LIBOR rate plus an applicable margin rate ranging from 1.125% to 1.750% based on our consolidated leverage ratio. The Credit Agreement also calls for other customary fees and charges, including an unused commitment fee ranging from 0.150% to 0.300% of the unused lending commitments, based on our consolidated leverage ratio. The Credit Agreement contains customary covenants and restrictions, including covenants that require us to maintain a minimum interest charge ratio, not to exceed a specified consolidated leverage ratio and to comply with laws, and restrictions on the ability to pay dividends and make certain other distributions, as specified therein. Failure to comply with these covenants would constitute an event of default under the Credit Agreement, notwithstanding the ability of the company to meet its debt service obligations. The Credit Agreement also includes various customary remedies for the lenders following an event of default, including the acceleration of repayment of outstanding amounts under the Credit Agreement.

At June 30, 2018, we had an outstanding principal balance of $1.1 billion on our Credit Agreement. We also had outstanding letters of credit of $0.2 million which reduced the amount available on our Credit Agreement to $850.3 million at June 30, 2018.

At June 30, 2018, the outstanding principal balance on our 5.25% senior unsecured notes due 2023 (the “2023 Senior Notes”) was $750.0 million. Our obligations under the 2023 Senior Notes are guaranteed on an unsecured senior basis by the same subsidiaries and affiliated professional contractors that guarantee the Credit Agreement. Interest on the 2023 Senior Notes accrues at the rate of 5.25% per annum, or $39.4 million, and is payable semi-annually in arrears on June 1 and December 1.

The indenture under which the 2023 Senior Notes are issued, among other things, limits our ability to (1) incur liens and (2) enter into sale and lease-back transactions, and also limits our ability to merge or dispose of all or substantially all of our assets, in all cases, subject to a number of customary exceptions. Although we are not required to make mandatory redemption or sinking

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fund payments with respect to the 2023 Senior Notes, upon the occurrence of a change in control of MEDNAX, we may be required to repurchase the 2023 Senior Notes at a purchase price equal to 101% of the aggregate principal amount of the 2023 Senior Notes repurchased plus accrued and unpaid interest.

At June 30, 2018, we believe we were in compliance, in all material respects, with the financial covenants and other restrictions applicable to us under our Credit Agreement and the 2023 Senior Notes. We believe we will be in compliance with these covenants throughout 2018.

We maintain professional liability insurance policies with third-party insurers, subject to self-insured retention, exclusions and other restrictions. We self-insure our liabilities to pay self-insured retention amounts under our professional liability insurance coverage through a wholly owned captive insurance subsidiary. We record liabilities for self-insured amounts and claims incurred but not reported based on an actuarial valuation using historical loss information, claim emergence patterns and various actuarial assumptions. Our total liability related to professional liability risks at June 30, 2018 was $242.9 million, of which $35.3 million is classified as a current liability within accounts payable and accrued expenses in the Condensed Consolidated Balance Sheet. In addition, there is a corresponding insurance receivable of $16.7 million recorded as a component of other assets for certain professional liability claims that are covered by insurance policies.

On August 2, 2018, we announced that our board of directors had authorized the repurchase of up to $500.0 million of shares of our common stock in addition to our existing share repurchase program. We intend to utilize various methods to effect the additional share repurchases, which are expected to commence in the near term. The amount and timing of repurchases will depend upon several factors, including general economic and market conditions and trading restrictions.

We anticipate that funds generated from operations, together with our current cash on hand and funds available under our Credit Agreement, will be sufficient to finance our working capital requirements, fund anticipated acquisitions and capital expenditures, fund our share repurchase programs and meet our contractual obligations for at least the next 12 months from the date of issuance of this Form 10-Q.

Caution Concerning Forward-Looking Statements

Certain information included or incorporated by reference in this Quarterly Report may be deemed to be “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements may include, but are not limited to, statements relating to our objectives, plans and strategies, and all statements (other than statements of historical facts) that address activities, events or developments that we intend, expect, project, believe or anticipate will or may occur in the future are forward-looking statements. These statements are often characterized by terminology such as “believe,” “hope,” “may,” “anticipate,” “should,” “intend,” “plan,” “will,” “expect,” “estimate,” “project,” “positioned,” “strategy” and similar expressions and are based on assumptions and assessments made by our management in light of their experience and their perception of historical trends, current conditions, expected future developments and other factors they believe to be appropriate. Any forward-looking statements in this Quarterly Report are made as of the date hereof, and we undertake no duty to update or revise any such statements, whether as a result of new information, future events or otherwise. Forward-looking statements are not guarantees of future performance and are subject to risks and uncertainties. Important factors that could cause actual results, developments and business decisions to differ materially from forward-looking statements are described in the Company’s most recent Annual Report on Form 10-K, including the section entitled “Risk Factors.”

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We are subject to market risk primarily from exposure to changes in interest rates based on our financing, investing and cash management activities. We intend to manage interest rate risk through the use of a combination of fixed rate and variable rate debt. We borrow under our Credit Agreement at various interest rate options based on the Alternate Base Rate or LIBOR rate depending on certain financial ratios. At June 30, 2018, the outstanding principal balance on our Credit Agreement was $1.1 billion. Considering the total outstanding balance of $1.1 billion, a 1.0% change in interest rates would result in an impact to income before income taxes of approximately $11 million per year.

Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) that are designed to provide reasonable assurance that information required to be disclosed by the Company in reports it files or submits under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in SEC rules and forms and (ii) accumulated and communicated to the Company’s management, including its principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

We carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act). Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of the end of the period covered by this report.

Changes in Internal Controls Over Financial Reporting

No changes in our internal control over financial reporting occurred during the quarter ended June 30, 2018 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II - OTHER INFORMATION

We expect that audits, inquiries and investigations from government authorities and agencies will occur in the ordinary course of business. Such audits, inquiries and investigations and their ultimate resolutions, individually or in the aggregate, could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our securities.

In the ordinary course of our business, we become involved in pending and threatened legal actions and proceedings, most of which involve claims of medical malpractice related to medical services provided by our affiliated physicians. Our contracts with hospitals generally require us to indemnify them and their affiliates for losses resulting from the negligence of our affiliated physicians and other clinicians. We may also become subject to other lawsuits that could involve large claims and significant defense costs. We believe, based upon a review of pending actions and proceedings, that the outcome of such legal actions and proceedings will not have a material adverse effect on our business, financial condition, results of operations, cash flows or the trading price of our securities. The outcome of such actions and proceedings, however, cannot be predicted with certainty and an unfavorable resolution of one or more of them could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our securities.

Although we currently maintain liability insurance coverage intended to cover professional liability and certain other claims, we cannot assure that our insurance coverage will be adequate to cover liabilities arising out of claims asserted against us in the future where the outcomes of such claims are unfavorable to us. With respect to professional liability risk, we self-insure a significant portion of this risk through our wholly owned captive insurance subsidiary. Liabilities in excess of our insurance coverage, including coverage for professional liability and certain other claims, could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our securities.

On July 10, 2018, a securities class action lawsuit was filed against our company and certain of our officers and a director in the U.S. District Court for the Southern District of Florida (Case No. 0:18-cv-61572-WPD) that purports to state a claim for alleged violations of Sections 10(b) and 20(a) of the Exchange Act, and Rule 10b-5 thereunder, based on statements made by the defendants primarily concerning our anesthesiology business. The complaint seeks unspecified damages, interest, attorneys’ fees and other costs. We believe this lawsuit to be without merit and intend to vigorously defend against it. The lawsuit is in the very early stages and, at this time, no assessment can be made as to its likely outcome or whether the outcome will be material to us.

There have been no material changes to the risk factors previously disclosed in the Company’s most recent Annual Report on Form 10-K.

During the three months ended June 30, 2018, the Company repurchased 1.2 million shares of its common stock for $52.2 million, inclusive of 54,909 shares withheld to satisfy minimum statutory withholding obligations of $2.5 million in connection with the vesting of restricted stock and stock option exercises during the three months ended June 30, 2018.

The amount and timing of any future repurchases will depend upon several factors, including general economic and market conditions and trading restrictions.

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On July 27, 2018, Ms. Vivian Lopez-Blanco informed the Company of her intent to retire as Chief Financial Officer and Treasurer of the Company. The Company intends to conduct a formal search to identify a successor to Ms. Lopez-Blanco. Ms. Lopez-Blanco will remain in her current role with the Company throughout the search process until the appointment of her successor, and for a transitional period thereafter.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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Exhibit 31.1

CERTIFICATION

I, Roger J. Medel, M.D., certify that:

Date: August 2, 2018

Exhibit 31.2

CERTIFICATION

I, Vivian Lopez-Blanco, certify that:

Date: August 2, 2018

Exhibit 32

Certification Pursuant to 18 U.S.C Section 1350

(Adopted by Section 906 of the Sarbanes-Oxley Act of 2002)

In connection with the Quarterly Report of MEDNAX, Inc. on Form 10-Q for the quarter ended June 30, 2018 (the “Report”), each of the undersigned hereby certifies, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of MEDNAX, Inc.

A signed original of this written statement required by Section 906 has been provided to MEDNAX, Inc. and will be retained by MEDNAX, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

August 2, 2018