The 100 largest HMOs.
There's no record like a broken one: HMO enrollment has bounded past 70 million, and eight plans now claim more than a million members each. Here's a look at InterStudy's listing of the nation's largest plans.
D003625:Data Collection; D006279:Health Maintenance Organizations / Q000145:classification / Q000706:statistics & numerical data*; D014481:United States