Exhibit 24.1
POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS that the undersigned Directors and Officers of McKesson Corporation, a Delaware corporation (the “Company”), do hereby constitute and appoint Laureen E. Seeger and Willie C. Bogan his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such Director and/or Officer, and to file with the Securities and Exchange Commission, a Registration Statement or Registration Statements on Form S-8 under the Securities Act of 1933, as amended, with respect to the registration of shares of the Company’s Common Stock, par value $0.01 per share, that may be issued by the Company under its McKesson Corporation 2013 Stock Plan, and to execute any and all amendments to any such Registration Statement (including post-effective amendments). The undersigned hereby grant 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 he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or either of them, or their or his or her substitutes or substitute, may lawfully do or cause to be done by virtue hereof. This Power of Attorney may be signed in several counterparts.
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/s/ Andy D. Bryant | | | | /s/ Marie L. Knowles |
| Andy D. Bryant, Director | | | | Marie L. Knowles, Director |
| | |
/s/ Wayne A. Budd | | | | /s/ David M. Lawrence |
| Wayne A. Budd, Esq., Director | | | | David M. Lawrence, M.D., Director |
| | |
/s/ John H. Hammergren | | | | /s/ Edward A. Mueller |
John H. Hammergren, Chairman of the Board, President and Chief Executive Officer (Principal Executive Officer) | | | | Edward A. Mueller, Director |
| | |
/s/ Alton F. Irby III | | | | /s/ Nigel A. Rees |
| Alton F. Irby III, Director | | | | Nigel A. Rees, Interim Chief Financial Officer,
Vice President and Controller
(Principal Accounting Officer) |
| | |
/s/ M. Christine Jacobs | | | | /s/ Jane E. Shaw |
| M. Christine Jacobs, Director | | | | Jane E. Shaw, Director |
Dated: July 31, 2013
