<SEC-DOCUMENT>0001193805-21-001252-index.html : 20210831
<SEC-HEADER>0001193805-21-001252.hdr.sgml : 20210831
<ACCEPTANCE-DATETIME>20210831073023
ACCESSION NUMBER:		0001193805-21-001252
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210831
DATE AS OF CHANGE:		20210831

SUBJECT COMPANY:	

	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:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-46595
		FILM NUMBER:		211225512

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Starboard Value LP
		CENTRAL INDEX KEY:			0001517137
		IRS NUMBER:				000000000

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		777 THIRD AVENUE, 18TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		(212) 845-7977

	MAIL ADDRESS:	
		STREET 1:		777 THIRD AVENUE, 18TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>sc13da406297280_08312021.htm
<DESCRIPTION>AMENDMENT NO. 4 TO THE SCHEDULE 13D
<TEXT>
Document 1 - file: sc13da406297280_08312021.htm

</DOCUMENT>
</SEC-DOCUMENT>