United States, Dec. 19 -- TriWest Healthcare Alliance, Phoenix, Arizona, was awarded $6,812,165,714 to exercise Option Period Two under contract HT940223C0002 (inclusive of adjustments to estimated health care costs, as a result of change orders accomplished during the implementation phase of contract performance; adjustments to managed care support services costs due to the protest delay contract shift; and the economic price adjustment for Option Period Two) for health care and administrative support services in support of the Defense Health Agency (DHA) TRICARE program in the West Region. The contractor will assist DHA in operating an integrated health care delivery system combining the resources of the contractor and the military's dire...