NEW YORK (Standard&Poor's) May 17, 2007--Standard&Poor's Ratings Services said today it has revised its outlook on UnitedHealth Group Inc. (NYSE:UNH) and UNH's operating subsidiaries to stable from negative. At the same time, Standard&Poor's affirmed its 'A' counterparty credit and senior debt ratings on UNH and affirmed its 'A+' counterparty credit and financial strength ratings on UNH's operating subsidiaries. "The outlook revision is based on significant progress in the company's corporate culture and governance remediation, the seven-year contract renewal with AARP, and the filing of current financial information consistent with SEC guidance," explained Standard&Poor's credit analyst Shellie Stoddard. Although legal uncertainties remain, as does the potential for financial penalties related to the firm's