POWER OF ATTORNEY


To be filed with the United States Securities and Exchange Commission


The undersigned, Glenn Morris Renwick, hereby authorizes and designates
each of Thomas L. Strickland, Christopher J. Walsh and Dannette L. Smith,
or either of them, acting singly with full power of substitution (each,
an "attorney-in-fact"), to sign and file on the undersigned's behalf any
Forms 3, 4, 5 or 144 (including any amendments thereto) that the
undersigned may be required to file with the Securities and Exchange
Commission as a result of the undersigned's ownership of or transactions
in securities of UnitedHealth Group Incorporated (the "Company") at any
date following the date hereof.  The authority of each attorney-in-fact
under this Power of Attorney will continue until the undersigned is no
longer required to file Forms 3, 4, 5 or 144 with regard to the
undersigned's ownership of or transactions in securities of the
Company, unless earlier revoked in writing.  The undersigned hereby
revokes all previous powers of attorney to sign or file on the
undersigned's behalf any Forms 3, 4, 5 or 144 with regard to Company
securities as of the date hereof, except that if the undersigned has
adopted any Rule 10b5-1 trading plan to transact in Company securities,
any powers of attorney the undersigned may have granted under the plan
to sign or file on the undersigned's behalf any Form 144 shall continue
to be in full force and effect in accordance with the terms of the plan.
The undersigned acknowledges that neither the Company nor an attorney-
in-fact are assuming any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934 or Rule 144 under
the Securities Act of 1933.

Date: June 5, 2008



/s/ Glenn Morris Renwick