Integrated managed care consortium in the United States. Kaiser Permanente is an American integrated managed care consortium headquartered in Oakland, California. Founded in 1945, it consists of three primary entities: the Kaiser Foundation Health Plan, Kaiser Foundation Hospitals, and the Permanente Medical Groups. The organization provides healthcare services to nearly 12.6 million members across eight states and Washington, D.C., operating around 40 hospitals and more than 600 medical offices. Kaiser Permanente employs approximately 242,914 people as of 2025. The company is well known for its focus on preventive healthcare, employing a unique structure that aligns health insurance with medical delivery, helping to promote coordinated and efficient care. Its integrated model and focus on patient wellness have made it one of the largest and most influential managed care organizations in the United States. Recent financial reports indicate continued growth in both revenue and membership base.