    <SEC-DOCUMENT>0001193125-21-091215-index.html : 20210323
    <SEC-HEADER>0001193125-21-091215.hdr.sgml : 20210323
    <ACCEPTANCE-DATETIME>20210323162154
    ACCESSION NUMBER:		0001193125-21-091215
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20210323
    DATE AS OF CHANGE:		20210323

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MEDNAX, INC.
    		CENTRAL INDEX KEY:			0000893949
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-HOSPITALS [8060]
    		IRS NUMBER:				263667538
    		STATE OF INCORPORATION:			FL
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-12111
    		FILM NUMBER:		21765034

    	BUSINESS ADDRESS:
    		STREET 1:		1301 CONCORD TERRACE
    		CITY:			SUNRISE
    		STATE:			FL
    		ZIP:			33323
    		BUSINESS PHONE:		9543840175

    	MAIL ADDRESS:
    		STREET 1:		1301 CONCORD TERRACE
    		CITY:			SUNRISE
    		STATE:			FL
    		ZIP:			33323

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	PEDIATRIX MEDICAL GROUP INC
    		DATE OF NAME CHANGE:	19950801
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>d142151ddefa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: d142151ddefa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g142151g11a22.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g142151g11a22.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g142151g12a36.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g142151g12a36.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>