Serving Maryland, the District of Columbia and portions of Virginia, CareFirst BlueCross BlueShield is the shared business name of CareFirst of Maryland, Inc. and Group Hospitalization and Medical Services, Inc. CareFirst BlueCross BlueShield Medicare Advantage is the shared business name of CareFirst Advantage, Inc. and CareFirst Advantage DSNP, Inc. CareFirst BlueCross BlueShield Community ....