POWER OF ATTORNEY



The undersigned, Lori Sweere, 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 and 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: April 29, 2008



/s/ Lori Sweere