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Top 25 U.S. Health Insurance Companies, By Market Share

  1. Unitedhealth Group

  2. Wellpoint Inc. Group

  3. Kaiser Foundation Group

  4. Humana Group

  5. Aetna Group

  6. HCSC Group

  7. Cigna Health Group

  8. Highmark Group

  9. Coventry Corp. Group

  10. HIP Insurance Group

  11. Independence Blue Cross Group

  12. Blue Cross Blue Shield of New Jersey Group

  13. Blue Cross Blue Shield of Michigan Group

  14. California Physicians' Service

  15. Blue Cross Blue Shield of Florida Group

  16. Health Net of California, Inc.

  17. Centene Corp. Group

  18. Carefirst Inc. Group

  19. Wellcare Group

  20. Blue Cross Blue Shield of Massachusetts Group

  21. UHC of California

  22. Lifetime Healthcare Group

  23. Cambia Health Solutions Inc.

  24. Metropolitan Group

  25. Molina Healthcare Inc. Group

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