Throughout its more than 65-year history, Blue Cross and Blue Shield of Oklahoma has been committed to meeting the health care financing needs of Oklahomans. As one of the state s oldest and largest private health insurers, BCBS of Oklahoma and its related subsidiaries provide benefit plans for more than 835,000 Oklahomans. The company is a division of Health Care Service Corporation, a Mutual Legal Reserve Company. HCSC operates through its divisions that include Blue Cross and Blue Shield of Illinois, Blue Cross and Blue Shield of Texas, Blue Cross and Blue Shield of New Mexico and BCBS of Oklahoma. HCSC is an independent licensee of the Blue Cross and Blue Shield Association, an association of nearly 40 independent Blue Cross and Blue Shield plans nationwide. Each plan is an independent corporation committed to providing affordable health insurance. Blue Cross and Blue Shield of Oklahoma is located in Tulsa, Okla.