By the numbers. 20 largest health insurers, by revenue. Based on 2006 healthcare-related revenue from health, life and health statutory filings.
D007182:Income / Q000706:statistics & numerical data; D007343:Insurance Carriers / Q000145:classification* / Q000191:economics / Q000706:statistics & numerical data; D007348:Insurance, Health / Q000191:economics* / Q000706:statistics & numerical data; D014481:United States