POWER OF ATTORNEY


To be filed with the United States Securities and Exchange Commission
//~~~t A-cs ($+4~ ~


/ The undersigned, Robert J. Darretta, of UnitedHealth Group Incorporated,
hereby authorizes and designates Dannette L. Smith, Deputy General Counsel
and Assistant Secretary, and Forrest G. Burke, Acting General Counsel, to
sign on his behalf any Forms 3, 4, 5 or 144 required to be filed with the
Securities and Exchange Commission at any date following the date hereof.
The undersigned also revokes all previous powers of attorney to sign on his
behalf any Forms 3, 4,5 or 144 as of the date hereof.

This Power of Attorney shall remain in effect until specifically revoked by
the undersigned.
           Date: ~~t4..gjiso , 2007