.

Direct Written Premiums: $176.7 billion Market Share: 14.1%

1. UnitedHealth

.

Direct Written Premiums: $104.2 billion Market Share: 8.3%

2. Kaiser Foundation

.

Direct Written Premiums: $76.9 billion Market Share: 6.2% 

3. Anthem, Inc.

.

Direct Written Premiums: $75 billion Market Share: 6% 

4. Centene Corp

.

Direct Written Premiums: $73.9 billion Market Share: 5.9% 

5. Humana

.

Direct Written Premiums: $69 billion Market Share: 5.5% 

6. CVS

.

Direct Written Premiums: $42 billion Market Share: 3.4% 

7. HCSC

.

Direct Written Premiums: $31.8 billion Market Share: 2.5% 

8. Cigna Health

.

Direct Written Premiums: $21.4 billion Market Share: 1.7% 

9. Molina Healthcare, Inc.

.

Direct Written Premiums: $20.1 billion Market Share: 1.6% 

10. Independence Health Group