Medical Management International, 2665 N Elston Ave, Chicago, IL 60647, US

Health Care Service Corporation is a customer-owned health insurer in the United States. It operates more than 55 offices in offices in Illinois, Texas, New Mexico, Oklahoma, Ohio and Colorado. The company has a staff of over 17,500 employees. Health Care Service Corporation maintains several subsidiaries, such as Blue Cross and Blue Shield of Illinois, Blue Cross and Blue Shield of New Mexico, Blue Cross and Blue Shield of Oklahoma, and Blue Cross and Blue Shield of Texas. The company focuses on matters related to the health and wellness of members and communities in the U.S. It provides employer-sponsored health, vision, dental, managed mental health and prescription drug plans. In addition, Health Care Service Corporation is a part of Mutual Legal Reserve Company.