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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 TWjPCrYDUIYCXw2ozLF5iJAxHD3qK4D/iJjRpolfQoW28AVe/QEygiGwZlSs3FQ1
 hHrPugJWEZKmNUbIyLntYw==

<SEC-DOCUMENT>0001207007-03-000067.txt : 20030529
<SEC-HEADER>0001207007-03-000067.hdr.sgml : 20030529
<ACCEPTANCE-DATETIME>20030529164353
ACCESSION NUMBER:		0001207007-03-000067
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030529
FILED AS OF DATE:		20030529

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MCKESSON CORP
		CENTRAL INDEX KEY:			0000927653
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-DRUGS PROPRIETARIES & DRUGGISTS' SUNDRIES [5122]
		IRS NUMBER:				943207296
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		ONE POST ST
		STREET 2:		MCKESSON PLAZA
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94104
		BUSINESS PHONE:		4159838300

	MAIL ADDRESS:	
		STREET 1:		ONE POST ST
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94104

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MCKESSON HBOC INC
		DATE OF NAME CHANGE:	19990115

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MCKESSON CORP
		DATE OF NAME CHANGE:	19950209

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SP VENTURES INC
		DATE OF NAME CHANGE:	19940728

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MEYERSON IVAN D
		CENTRAL INDEX KEY:			0001197895

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13252
		FILM NUMBER:		03723869

	BUSINESS ADDRESS:	
		STREET 1:		C/O MCKESSON CORP
		STREET 2:		ONE POST ST.
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94104
		BUSINESS PHONE:		4159838300

	MAIL ADDRESS:	
		STREET 1:		C/O MCKESSON CORP
		STREET 2:		ONE POST ST.
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94104
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-05-29</periodOfReport>
    <issuer>
        <issuerCik>0000927653</issuerCik>
        <issuerName>MCKESSON CORP</issuerName>
        <issuerTradingSymbol>MCK</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId>
            <rptOwnerCik>0001197895</rptOwnerCik>
            <rptOwnerName>MEYERSON IVAN D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>SVP, General Counsel </officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeSecurity><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-05-27</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>4450</value><footnoteId id="F1"/></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>173759</value><footnoteId id="F3"/><footnoteId id="F2"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOw
nership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></nonDerivativeSecurity><footnotes><footnote id="F1">Shares acquired pursuant to a Restricted Stock award under the Company's 1994 Stock Option and Restricted Stock Plan.  Restrictions on these shares will lapse on 5/27/2006.</footnote><footnote id="F2">Reporting individual has 1,400 shares which he holds indirectly as custodian for his minor child and for which beneficial ownership is disclaimed.</footnote><footnote id="F3">Reporting individual has 13,687.172 shares which are indirectly held by the Trustee of the Company's PSIP. </footnote></footnotes><ownerSignature><signatureName>Kristina Veaco, Attorney-in-Fact</signatureName><signatureDate>2003-05-29</signatureDate></ownerSignature></ownershipDocument>

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</SEC-DOCUMENT>
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