Top Health Insurance Companies in the U.S.

Below are the top health insurance companies in the United States. They are listed by size of market share, in descending order.

As an added level of clarification, size of market share does not always correlate with the quality of product or service provided, nor does it guarantee the company will retain its position through the entire year. This list considers data gathered through the end of 2018.

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

1. UnitedHealth
2. Kaiser Foundation
3. Anthem Inc.
4. Humana
5. CVS
6. Health Care Service Corporation (HCSC)
7. Centene Corp
8. Cigna Health
9. Wellcare
10. Molina Healthcare Inc.
11. Guidewell Mut Holding
12. California Physicians Service
13. Independence Health Group Inc.
14. Blue Cross of California
15. Highmark Group
16. Blue Cross Blue Shield of Michigan
17. Blue Cross Blue Shield of New Jersey
18. Caresource
19. Blue Cross Blue Shield of North Carolina
20. Carefirst Inc.
21. Health Net of California, Inc.
22. UPMC Health System
23. Blue Cross Blue Shield of Massachusetts
24. Blue Cross Blue Shield of Tennessee
25. Metropolitan

Source: NAIC