Founded in 1936, Health Care Service Corporation (HCSC) is a non-investor-owned mutual legal reserve company. As the largest customer-owned health insurer in the U.S., HCSC provides a wide variety of life and health insurance products and related services to more than 18 million members. The company operates through its Blue Cross and Blue Shield® Plans in five states: Illinois, Montana, New Mexico, Oklahoma, and Texas. HCSC is committed to expanding access to high-quality, cost-effective health care and equipping its members with information and tools to make the best health care decisions for themselves and their families.