Aetna is a major American health insurance company that provides medical, dental, pharmacy, group life, disability, and long-term care insurance plans. Founded in 1853, AETNA is one of the oldest health insurance companies in the United States and is currently the third largest health insurer in the country. AETNA offers a wide range of health insurance plans to individuals, families, and employers, as well as Medicare and Medicaid plans. AETNA also provides a variety of other services, such as wellness programs, health education, and disease management.