Aetna is a large health insurance provider based in Hartford, Connecticut. It is one of the largest health insurers in the United States, providing coverage to more than 22 million people. AETNA offers a wide range of health insurance plans, including employer-sponsored plans, individual and family plans, Medicare and Medicaid plans, and dental and vision plans. AETNA also provides a variety of other services, such as pharmacy benefits management, health care management, and wellness programs.