Health Care Service Corp. provides health care coverage to more than 13 million people through Blue Cross Blue Shield of Illinois, New Mexico, Oklahoma and Texas. The Chicago-based company, which was founded in 1936 as the Chicago Plan for Hospital Care, is the country's fourth-largest health insurer. It does business as a nonprofit and is owned by its policyholders.
HCSC is a $50 billion company with more than 19,000 employees. It soon will add Blue Cross Blue Shield of Montana to its roster of plans.
