5 top ranking private health insurance companies in USA

1. Harvard Pilgrim Health Care (HMO/POS)
Maine, Massachusetts

2. Tufts Associated Health Maintenance Organization (HMO/POS)
Massachusetts, New Hampshire, Rhode Island

3. Harvard Pilgrim Health Care of New England (HMO/POS)
New Hampshire

4. Grand Valley Health Plan (HMO)
Michigan

5. Geisinger Health Plan (HMO/POS)
Pennsylvania