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FOR IMMEDIATE RELEASE

UNITEDHEALTH GROUP AND OXFORD HEALTH PLANS COMPLETE MERGER

TRUMBULL, CT, July 29, 2004 - Oxford Health Plans, Inc. (Oxford) (NYSE: OHP) announced today that all necessary approvals to complete its merger with UnitedHealth Group (NYSE: UNH) have been received and that the merger was completed following the close of business today.

Under the merger agreement, Oxford stockholders will receive $16.17 in cash and 0.6357 of a share of UnitedHealth Group common stock for each share of Oxford common stock.

"We look forward to combining the resources of our companies and leveraging our strengths to advance health and well-being on behalf of employers, consumers, physicians and hospitals in the tri-state region," stated Charles Berg, who will remain chief executive officer of Oxford and additionally will assume responsibility for all UnitedHealthcare operations serving the tri-state markets.

About Oxford Health Plans, Inc.

Founded in 1984, Oxford Health Plans, Inc. provides health plans to employers and individuals primarily in New York, New Jersey and Connecticut, through its direct sales force, independent insurance agents and brokers. Oxford's commercial insured products and services include traditional health maintenance organizations, preferred and exclusive provider organizations, point-of-service plans and consumer-directed health plans. The Company also offers Medicare plans and third-party administration of employer-funded benefits plans. More information about Oxford Health Plans, Inc. is available at www.oxfordhealth.com.

About UnitedHealth Group

UnitedHealth Group (www.unitedhealthgroup.com) is a diversified Fortune 100 company that provides a broad spectrum of resources and services to help people achieve improved health and well-being through all stages of life. UnitedHealth Group offers products and services through six operating businesses: UnitedHealthcare, Ovations, AmeriChoice, Uniprise, Specialized Care Services and Ingenix. Through its family of businesses, UnitedHealth Group serves more than 55 million individuals nationwide.

Forward-Looking Statements

This news release may contain statements, estimates or projections that constitute "forward-looking" statements as defined under U.S. federal securities laws. Generally the words "believe," "expect," "intend," "estimate," "anticipate," "project," "will" and similar expressions identify forward-looking statements, which generally are not historical in nature. By their nature, forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from our historical experience and our present expectations or projections. A list and description of some of the risks and uncertainties can be found in the Registration Statement on Form S-4, as amended (Registration Number 333-115327), filed by UnitedHealth Group with the Securities and Exchange Commission in connection with the merger. You should not place undue reliance on forward-looking statements, which speak only as of the date they are made. Except to the extent otherwise required by federal securities laws, we do not undertake to publicly update or revise any forward-looking statements.

©1996-, Oxford Health Plans, Inc.