Anthem Blue Cross Blue Shield health insurance has been providing health insurance since 1944. It merged with WellPoint Health Networks in 2004, making it one of the largest medical coverage companies in America. Anthem is a member of the Blue Cross Blue Shield Association, a trade organization that represents the plans nationwide. Anthem health plans aren’t just about coverage to pay your medical bills. Anthem provides access to large networks of healthcare providers, including some of the nation’s best doctors and hospitals.