UnitedHealth Group (UNH)

Re-Evaluation of Disclosure Controls and Procedures as of March 31, 2006

The Company maintains disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) that are designed to provide reasonable assurance that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in SEC rules and forms and (ii) accumulated and communicated to the Company’s management, including its principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

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In connection with the filing of this Form 10-Q/A, management re-evaluated, under the supervision and with the participation of the Company’s Chief Executive Officer and Chief Financial Officer, the effectiveness of the design and operation of the Company’s disclosure controls and procedures as of March 31, 2006. Based upon that re-evaluation, the Company’s Chief Executive Officer and Chief Financial Officer concluded that the Company had a material weakness in internal control over financial reporting solely relating to stock option plan administration and accounting for and disclosure of stock option grants as of March 31, 2006 and that, solely for this reason, its disclosure controls and procedures were not effective as of March 31, 2006.