SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* HAMMERGREN JOHN H (Last) (First) (Middle) ONE POST STREET (Street) SAN FRANCISCO CA 94104 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol MCKESSON CORP [ MCK ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner X Officer (give title below) Other (specify below) Chairman, President & CEO
	3. Date of Earliest Transaction (Month/Day/Year) 03/06/2007
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/06/2007		M		15,000	A	$29.8125	176,567	D
Common Stock	03/06/2007		S		15,000(1)	D	$54.4628	161,567	D
Common Stock	03/06/2007		M		25,000	A	$29.8125	186,567	D
Common Stock	03/06/2007		S		25,000(1)	D	$55.0213	161,567	D
Common Stock	03/07/2007		M		10,000	A	$29.8125	171,567	D
Common Stock	03/07/2007		S		10,000(1)	D	$55.1512	161,567	D
Common Stock	03/07/2007		M		50,000	A	$29.8125	211,567	D
Common Stock	03/07/2007		S		50,000(1)	D	$55.0037	161,567	D
Common Stock								3,557	I	By Trustee of PSIP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (Right-to-buy)	$29.8125	03/06/2007		M			15,000(1)	(2)	08/16/2009	Common Stock	15,000	$0	1,048,000	D
Employee Stock Option (Right-to-Buy)	$29.8125	03/06/2007		M			25,000(1)	(2)	08/16/2009	Common Stock	25,000	$0	1,023,000	D
Employee Stock Option (Right-to-Buy)	$29.8125	03/07/2007		M			10,000(1)	(2)	08/16/2009	Common Stock	10,000	$0	1,013,000	D
Employee Stock Option (Right-to-Buy)	$29.8125	03/07/2007		M			50,000(1)	(2)	08/16/2009	Common Stock	50,000	$0	963,000	D

Explanation of Responses:

1. Sale was made pursuant to a previously adopted plan dated 6/15/2006, intended to comply with Rule 10b5-1(c).

2. This option vested in 3 installments; 50% on the 2nd anniversary of the date of grant and 25% on each of the 3rd and 4th anniversary of the date of grant.

Remarks:

	Donna Spinola , Attorney-in-fact	03/08/2007
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (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).
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