The 10 largest health insurance companies by membership

Insider Monkey compiled the 10 largest U.S. health insurance companies by total enrollees.

Here are the top 10 from most members to fewest members.

1. UnitedHealthcare Group, 70 million members
2. Anthem, 39.4 million members
3. Aetna, 23 million members
4. Health Care Services Corp., 15 million members
5. Cigna, 14.7 million members
6. Humana, 14.23 million members
7. Centene Corp., 11 million members
8. Kaiser Permanente, 10.7 million members
9. Highmark, 5.3 million members
10. WellCare Health Plans, 3.68 million members

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