Aetna - national health plans, consumer information.
Provider directory: Aetna Provider Locator
Humana - national health plans, consumer information.
Provider directory: Humana Provider Locator
Cigna-national health plans, consumer information, Provider directory: Cigna Provider Directory
Catholic Health Care West - Western States health plans, consumer information, provider directory.
Coventry Health Care Plans - East & Midwest health plans, consumer information.
Kaiser Permanente - national health plans, consumer information, provider directory.
Mid Atlantic Medical Services, Inc. - Eastern Sates health plans, consumer information, provider directory.
Blue Cross / Blue Shield - national health plans, consumer information.
United Health -national health plans, consumer information, Provider directory: United Health Provider Locator