NEW YORK (Standard&Poor's CreditWire) Jan. 21, 2000--Standard&Poor's today affirmed its ratings (see list) on United HealthCare Corp. d/b/a UnitedHealth Group (UHG) and its affiliated entities. The outlook is stable. Major Rating Factors: -- Strong business position. UHG is one of the largest health care organizations in the U.S., providing services and benefits to about 14.5 million lives. UHG is well diversified, operating more than 40 organized health plans, four insurance companies, and related health service units. It has physician and hospital networks in all 50 states, the District of Columbia, and international locations. -- Strong managed care capabilities. Aided by internal technological competencies and resources for data analysis, UHG's innovative approach to medical review, products, and