Fact Based List:

Top 15 Health Plans Organizations Ranked by Enrollment

  1. WellPoint. Inc. 33.95 million
  2. UnitedHealth Group, Inc. 31.98 million
  3. Aetna, Inc. 18.55 million
  4. Health Care Service Corporation 12.4 million
  5. CIGNA HealthCare, Inc. 11.13 million
  6. Kaiser Permanente 8.72 million
  7. Humana, Inc. 8.3 million
  8. Health Net, Inc. 6.6 million
  9. Blue Cross Blue Shield of Michigan 4.54 million
  10. Highmark, Inc. 4.11 million
  11. Coventry Health and Life Insurance Company 3.6 million
  12. AmeriHealth Mercy/Independence Blue Cross 3.59 million
  13. Blue Cross and Blue Shield of Alabama 3.57 million
  14. CareFirst BlueCross BlueShield 3.33 million
  15. Medical Mutual of Ohio 3.15 million

Source: Managed Care Fact Sheets from MCOL
Source URL: http://www.mcareol.com/factshts/factmco.htm
Notes: Total medical enrollment includes fully insured and known self-insured (ASO) medical membership in commercial and public-sector health plans, as of fall 2009. Health plans consolidated by parent organization where applicable. Fact Sheet Source: AIS's Directory of Health Plans: 2010. http://www.aishealth.com/Products/dhp.html