The military's integrated health care deliver system. The TRICARE system includes the Civilian Health and Medical Program of the Uniformed Services - CHAMPUS. TRICARE gives the regional military treatment facilities control of health care deliver costs and purchasing. The TRICARE system splits U.S. military bases into 12 designated regions. One major military health care facility within each of the regions is designated as the "lead agent," which is responsible for organizing and maintaining an integrated delivery network, including civilian providers. BCBSKS participates in TriWest, which is the deliverer of care for this region.