Health Care Service Corporation (HCSC) is a member-owned health insurance company in the United States. HCSC was formerly known as Hospital Service Corporation and changed its name to Health Care Service Corporation in 1975. 

The company was founded in 1936 and is based in Chicago, Illinois with a network of offices in the United States. Health Care Service Corporation is the licensee of the Blue Cross and Blue Shield Association for five states. It concentrates its operations in Illinois, Montana, New Mexico, Oklahoma, and Texas.

HCSC is the fifth-largest health insurer in the US overall and employs more than 23,000 people. As of 2023, it was noted to be the third-largest commercial health insurer in the United States. It serves nearly 19 million members. HCSC offers group life, disability, and dental policies, as well as a range of other individual policies. The company also provides various care management and wellness resources.

The company provides options for employers, individuals and families as well as Medicare and Medicaid plans, and HCSC has a network of affiliates and subsidiaries offering related health care products and services, such as life, dental, health technology and pharmacy solutions.

According to en.wikipedia.org; hcsc.com. Source of photos: internet