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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 DjlKeuxbxhUnegUdrnePTw8VRxI+OWaUU0gGL63m9hcAwpdwyrnsp0vVH3WHAzkN
 qotiBPJUc8SRgT68afrqLQ==

<SEC-DOCUMENT>0001419658-08-000013.txt : 20080617
<SEC-HEADER>0001419658-08-000013.hdr.sgml : 20080617
<ACCEPTANCE-DATETIME>20080617200806
ACCESSION NUMBER:		0001419658-08-000013
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080613
FILED AS OF DATE:		20080617
DATE AS OF CHANGE:		20080617

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Emergency Medical Services CORP
		CENTRAL INDEX KEY:			0001344154
		STANDARD INDUSTRIAL CLASSIFICATION:	LOCAL & SUBURBAN TRANSIT & INTERURBAN HWY PASSENGER TRAINS [4100]
		IRS NUMBER:				203738384
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		6200 S. SYRACUSE WAY
		CITY:			GREENWOOD VILLAGE
		STATE:			CO
		ZIP:			80111
		BUSINESS PHONE:		303-495-1200

	MAIL ADDRESS:	
		STREET 1:		6200 S. SYRACUSE WAY
		CITY:			GREENWOOD VILLAGE
		STATE:			CO
		ZIP:			80111

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EPSTEIN STEVEN B
		CENTRAL INDEX KEY:			0001276619

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32701
		FILM NUMBER:		08904384

	BUSINESS ADDRESS:	
		STREET 1:		2273 RESEARCH BLVD
		STREET 2:		2ND FLOOR
		CITY:			ROCKVILLE
		STATE:			MD
		ZIP:			20850
		BUSINESS PHONE:		3015482900
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-06-13</periodOfReport>

    <issuer>
        <issuerCik>0001344154</issuerCik>
        <issuerName>Emergency Medical Services CORP</issuerName>
        <issuerTradingSymbol>EMS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001276619</rptOwnerCik>
            <rptOwnerName>EPSTEIN STEVEN B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>10105 IRON GATE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>POTOMAC</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>20854</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2008-06-13</value>
                <footnoteId id="F2"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4145</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4145</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14850</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each Restricted Stock Unit represents the right to receive one share of the Issuer's class A common stock.</footnote>
        <footnote id="F2">Pursuant to the terms of the Issuer's Non-Employee Director Compensation Program, on June 13, 2008, the terms of the grant of the Restricted Stock Units were finalized based upon the Issuer's closing stock price as of June 13, 2008.</footnote>
        <footnote id="F3">The Restricted Stock Units will vest on the date of the Issuer's 2009 annual meeting of stockholders, immediately prior to the vote for directors, if the reporting person has been a director for the entire year and has attended at least 75% of the meetings held by the Board of Directors and the Board committees on which he serves, and will be paid at that time in shares of the Issuer's class A common stock unless the reporting person has made an election to defer the receipt of such shares at the time and in the manner provided by the Board of Directors.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Carl F. Berglind, as attorney-in-fact</signatureName>
        <signatureDate>2008-06-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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