Highmark Health and its subsidiaries and affiliates constitute a diversified health and wellness system based in Pittsburgh that employs 37,000 people and serves millions of individuals, making the system the third largest integrated health care delivery and financing network in the nation. Highmark Health, a Pennsylvania nonprofit corporation, is the parent company of Highmark Inc. that directly or through its subsidiaries and affiliates provides health insurance, dental insurance, vision care and other related health products and services to customers. Highmark Health is also the parent company for an integrated health care delivery network that includes seven hospitals, physician organizations, a group purchasing organization and ambulatory surgery centers.