Several health insurance providers, such as United HealthCare Services, Coventry Health Care, Aetna and Amerihealth provide physician directories online. The official U.S. government site for Medicare also offers an online directory called Physician Compare.
United HealthCare allows members to search online for physicians included in the health care provider's network, according to its website. A general directory of physicians, health care facilities and other providers is also available. United HealthCare provides separate directories for Medicaid and Medicare physicians as well.
Aetna's online directory of health care professionals lets users search for health care services within a specific location, notes its website. Users can also filter results by conditions, procedures and provider types, such as behavioral health services, health care professionals, hospitals and facilities.