EXHIBIT 21 SUBSIDIARIES OF REGISTRANT SUBSIDIARIES OF UNITED HEALTHCARE CORPORATION STATE OF INCORPORATION NAME OR ORGANIZATION - ---- --------------- United HealthCare Services, Inc. (1) Minnesota United Health and Life Insurance Company (2) Minnesota United Behavioral Systems, Inc. (3) Minnesota United Behavioral Systems, Inc. Iowa United Behavioral Health of New York, I.P.A. Inc. New York United HealthCare of Georgia, Inc. Georgia United HealthCare of Utah Utah PrimeCare Health Plan, Inc. Wisconsin United HealthCare of Ohio, Inc. Ohio United HealthCare Insurance Company of Ohio Ohio United HealthCare of New England, Inc. Rhode Island United HealthCare of the Midlands, Inc. Nebraska United HealthCare of Illinois, Inc. (4) Delaware United HealthCare Insurance Company of Illinois Illinois United HealthCare South, Inc. Alabama United HealthCare of Florida, Inc. Florida United HealthCare of Alabama-FQ, Inc. Alabama United HealthCare Network, Inc. Alabama United HealthCare of Arkansas, Inc. Arkansas United HealthCare of Mississippi, Inc. Mississippi United HealthCare of Tennessee, Inc. Tennessee United HealthCare of Alabama, Inc. Alabama United HealthCare of Louisiana, Inc. Louisiana United HealthCare of the Midwest, Inc. Missouri United HealthCare Plans of Puerto Rico, Inc. Puerto Rico UHC Overseas R.S.A., Inc. Delaware UHC International Holdings, Inc. Delaware UHC Holdings R.S.A., L.L.C. Delaware The MetraHealth Insurance Company Connecticut MetraHealth Care Management Corporation Delaware United HealthCare Insurance Company of New York New York The MetraHealth Employee Benefits Company, Inc. Connecticut ProAmerica Managed Care, Inc. Texas The MetraHealth Care Network, Inc. Delaware U.S. Behavioral Health California United HealthCare of Upstate New York, Inc. New York United HealthCare of Texas, Inc. Texas U.S. Behavioral Health Plan, California California United HealthCare Service Corp. New York United HealthCare Administrators, Inc. Connecticut United HealthCare of Arizona, Inc. Arizona United HealthCare of California, Inc. California United HealthCare of Colorado, Inc. Colorado MetraHealth Care Plan of Kansas City, Inc. Missouri United HealthCare of New Jersey, Inc. New Jersey SUBSIDIARIES OF UNITED HEALTHCARE CORPORATION STATE OF INCORPORATION NAME OR ORGANIZATION - ---- --------------- United HealthCare of New York, Inc. New York Applied HealthCare Informatics, Inc. Delaware United HealthCare of Virginia, Inc. Virginia PHP, Inc. North Carolina Optum Services, Inc. Ontario, Canada United HealthCare (Deutschland) GmbH Germany HealthWise of America, Inc. Delaware United HealthCare of the MidAtlantic, Inc. Maryland HealthWise of Kentucky, Ltd. Kentucky _______________________________________________________________________________ 1. Also doing business as United HealthCare Services of Minnesota, Inc. Previously doing business as "UHC Management Company, Inc.", "Charter Med, Incorporated", "Charter HealthCare, Inc.", Charter Med, Inc. of Minnesota" and "Charter Med, Incorporated of Minnesota." Also doing business as "United HealthCare Services of Minnesota, Inc., "Healthmarc", "EverCare", "Employee Performance Design", "HealthCare Evaluation Services", "Managed Care for the Aged", "United HealthCare", "United HealthCare Corporation", "United HealthCare Management Company, Inc.", "United HealthCare Management", "UMC Management Company, Inc.", "Personal Decision Services", "UHC Management and Administrators", "United Resource Networks", "Health Pro", "Institute for Human Resources", "The Long Term Care Group" and "Health Professionals Review", "United HealthCare of Illinois, Inc." and "UHC of Illinois, Inc." 2. Also doing business as "UHC Insurance Company." 3. Also doing business as "United Behavioral Clinics" and "Positive Focus Professional Counseling Associates." 4. Also doing business as "Chicago HMO Ltd."