FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   Pepia John C 2. Date of Event Requiring Statement (Month/Day/Year) 08/07/2016 3. Issuer Name and Ticker or Trading Symbol MEDNAX, INC. [MD] (Last) (First) (Middle) 1301 CONCORD TERRACE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Principal Accounting Officer 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) SUNRISE, FL 33323 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 28,304 (1) (2) D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options (Right to Buy)	06/01/2010	06/01/2017	Common Stock	2,500 (3)	$ 28.545	D	Â
Stock Options (Right to Buy)	06/01/2011	06/02/2018	Common Stock	12,000 (4)	$ 27.715	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Pepia John C 1301 CONCORD TERRACE SUNRISE, FL 33323	Â	Â	  Principal Accounting Officer	Â

Signatures

Dominic J. Andreano, Attorney-in-Fact		08/12/2016
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Includes 1,121 restricted shares granted pursuant to Issuer's 2008 Amended and Restated Incentive Compensation Plan, as amended ("ICP") which will vest on June 1, 2017. Also includes 1,840 restricted shares granted pursuant to Issuer's ICP which will vest in equal installments on June 1, 2017 and June 1, 2018. Also includes 3,310 restricted shares granted pursuant to Issuer's ICP which will vest in three installments on June 1, 2017, June 1, 2018 and June 1, 2019.
(2)	Includes 13,111 shares directly owned by Reporting Person and 8,922 shares that were acquired by Reporting Person through Issuer's Employee Stock Purchase Plan.
(3)	Stock Options granted under Issuer's 2004 Incentive Compensation Plan.
(4)	Stock Options granted under Issuer's 2008 Incentive Compensation Plan.

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