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 *   Spratt Randall N 2. Date of Event Requiring Statement (Month/Day/Year) 07/27/2005 3. Issuer Name and Ticker or Trading Symbol MCKESSON CORP [MCK] (Last) (First) (Middle) ONE POST STREET 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP and CIO 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) SAN FRANCISCO, CA 94104 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 4,190.8496 (1) D   Common Stock 2,073 I By Trustee of PSIP

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
Employee Stock Option (Right to buy)	  (2)	02/13/2006	Common Stock	2,960	$ 29.81	D	Â
Employee Stock Option (Right-to-buy)	  (2)	05/02/2006	Common Stock	5,920	$ 39.7	D	Â
Employee Stock Option (Right-to-buy)	  (2)	02/11/2007	Common Stock	3,361	$ 39.74	D	Â
Employee Stock Option (Right-to-buy)	  (2)	02/11/2007	Common Stock	1,079	$ 39.74	D	Â
Employee Stock Option (Right-to-buy)	  (2)	02/10/2008	Common Stock	1,333	$ 71.54	D	Â
Employee Stock Option (Right-to-buy)	  (2)	02/10/2008	Common Stock	1,997	$ 71.54	D	Â
Employee Stock Option (Right-to-buy)	  (2)	01/27/2009	Common Stock	2,000	$ 73	D	Â
Employee Stock Option (Right-to-buy)	  (2)	08/16/2009	Common Stock	3,000	$ 29.8125	D	Â
Employee Stock Option (Right-to-buy)	  (2)	01/31/2010	Common Stock	97,000	$ 20.5626	D	Â
Employee Stock Option (Right-to-buy)	  (2)	10/30/2010	Common Stock	12,000	$ 28.25	D	Â
Employee Stock Option (Right-to-buy)	  (2)	01/31/2011	Common Stock	10,000	$ 32.67	D	Â
Employee Stock Option (Right-to-buy)	  (2)	07/25/2011	Common Stock	8,000	$ 38.65	D	Â
Employee Stock Option (Right-to-buy)	  (2)	01/29/2012	Common Stock	5,500	$ 38.2	D	Â
Employee Stock Option (Right-to-buy)	  (2)	07/30/2012	Common Stock	5,500	$ 32.92	D	Â
Employee Stock Option (Right-to-buy)	  (2)	01/27/2013	Common Stock	8,000	$ 28.28	D	Â
Employee Stock Option (Right-to-buy)	  (2)	07/30/2013	Common Stock	20,000	$ 34.36	D	Â
Employee Stock Option (Right-to-buy)	  (2)	05/25/2011	Common Stock	24,000	$ 34.94	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Spratt Randall N ONE POST STREET SAN FRANCISCO, CA 94104	Â	Â	  EVP and CIO	Â

Signatures

Kristina Veaco, Attorney-in-fact		07/27/2005
**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)	Shares purchased under the Issuers Employee Stock Purchase Plan.
(2)	Stock option grant made pursuant to the Issuers Stock Option and Restricted Stock Plan. All shares are currently 100% vested and exercisable.

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