Insurance basics - Personal insurance made simple

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3. The USA's 25 largest health insurance companies In 2009, the largest health insurance companies in the United States collected approximately $650 billion in premiums. The largest 25 (ranked by market share) accounted for over 60% of the total.
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5. According to the NAIC (National Association of Insurance Commissioners), the top 25 health insurance companies in the USA in 2011 were: 
6. Unitedhealth Group
7. Wellpoint Inc. Group
8. Kaiser Foundation Group
9. Aetna Group
10. Humana Group
11. HCSC Group
12. Coventry Corp. Group
13. Highmark Group
14. Independence Blue Cross Group
15. Blue Shield of CA Group
16. Cigna Health Group
17. BCBS of MI Group
18. Health Net of California, Inc.
19. BCBS of NJ Group
20. BCBS of FL Group
21. Regence Group
22. BCBS of MA Group
23. Carefirst Inc. Group
24. Wellcare Group
25. HIP Ins. Group
26. Metropolitan Group
27. Unumprovident Corp. Group
28. Universal Amer Fin Corp. Group
29. Lifetime Healthcare Group
30. BCBS of NC Group