MINNEAPOLIS--(BUSINESS WIRE)--April 14, 2005--UnitedHealth Group (NYSE:UNH): -- Revenues for First Quarter up 34% to $10.9 Billion -- Strong Growth Achieved Across Multiple Businesses -- Operating Margin Expanded to 11.5% -- Operating Cash Flows of $1.2 Billion, Up 33% -- Earnings Per Share Increased 32% UnitedHealth Group (NYSE:UNH) achieved record results in the first quarter of 2005, reported Chairman and CEO William W. McGuire, M.D. First quarter results were driven by strong and diverse growth and consistent operating performance across the spectrum of UnitedHealth Group businesses, with every reporting segment producing both year-over-year gains in earnings from operations and expanded operating margins.