CareFirst is a nonprofit, non-stock health care insurer in the Mid-Atlantic region. The company employs more than 5,400 employees and is headquartered in Owings Mills, Md. It provides Maintenance Organization and Preferred Provider Organization plans to employees of companies of all sizes that offer access to a network of doctors and more than 160 hospitals. CareFirst offers self-insured employees administrative services through its third-party administrator, NCAS. The company operates a for-profit regional Health Maintenance Organization subsidiary - CareFirst BlueChoice - that is a licensee of the Blue Cross and Blue Shield Association. CareFirst is the parent company of CareFirst of Maryland and Group Hospitalization and Medical Services; affiliates that do business as CareFirst BlueCross BlueShield. The company maintains a board of directors and observes special statutes to regulate its business in Maryland, the District of Columbia, Delaware and Northern Virginia.