Attached files

file filename
EX-23 - CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM - MCKESSON CORPmck_exhbit23x3312018.htm
10-K - 10-K - MCKESSON CORPmck_10kx3312018.htm
EX-32 - CERTIFICATION PURSUANT TO 18 U.S.C.SECTION 1350 - MCKESSON CORPmck_exhibit32x3312018.htm
EX-31.2 - CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO SECTION 302 - MCKESSON CORPmck_exhibit312x3312018.htm
EX-31.1 - CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 302 - MCKESSON CORPmck_exhibit311x3312018.htm
EX-21 - LIST OF SUBSIDIARIES OF THE REGISTRANT - MCKESSON CORPmck_exhibit21x3312018.htm
EX-12 - COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES - MCKESSON CORPmck_exhibit12x3312018.htm



Exhibit 24

POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that each of the undersigned directors and officers of McKesson Corporation, a Delaware corporation, does hereby constitute and appoint Britt J. Vitalone, Lori A. Schechter and Michele Lau such undersigned’s true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for such undersigned and in his or her name, place and stead, in any and all capacities, to sign an Annual Report on Form 10-K for the fiscal year ended March 31, 2018, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as such undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or each of them, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof. This Power of Attorney may be signed in several counterparts.

/s/ John H. Hammergren
 
/s/ Donald R. Knauss
John H. Hammergren
Chairman of the Board,
President and Chief Executive Officer
(Principal Executive Officer)
 
Donald R. Knauss, Director


 
 
 
/s/ Britt J. Vitalone
 
/s/ Marie L. Knowles
Britt J. Vitalone
Executive Vice President and Chief Financial Officer
(Principal Financial Officer)
 
Marie L. Knowles, Director


 
 
 
/s/ Erin M. Lampert
 
/s/ Bradley E. Lerman
Erin M, Lampert
Senior Vice President and Chief Accounting Officer
(Principal Accounting Officer)
 
Bradley E. Lerman, Director


 
 
 
/s/ Andy D. Bryant
 
/s/ Edward A. Mueller
Andy D. Bryant, Director


 
Edward A. Mueller, Director


 
 
 
/s/ N. Anthony Coles, M.D.
 
/s/ Susan R. Salka
N. Anthony Coles, M.D., Director
 
Susan R. Salka, Director
 
 
 
/s/ M. Christine Jacobs
 
 
M. Christine Jacobs, Director


 
 
 
 
 
Dated: May 24, 2018