Aetna is a nationwide competitor in the health insurance industry. It is one of the largest health insurers in the United States, providing coverage to more than 22 million people. AETNA was founded in 1853 and is headquartered in Hartford, Connecticut. It offers a wide range of health insurance plans, including individual, family, and employer-sponsored plans. AETNA also provides Medicare and Medicaid coverage, as well as dental, vision, and life insurance.