TriWest Healthcare Alliance is a Phoenix, Arizona based corporation that manages health benefits under the United States Department of Veterans Affairs VAPCCC program in Regions 3, 5, and 6. On October 1, 2018, TriWest's contract for VAPCCC was expanded to cover Regions 1, 2, and 4.
In 1996, TriWest Healthcare Alliance was established in order to compete for a U.S. Government contract to manage civilian health care benefits under the newly established TRICARE program within the 16-state TRICARE Central Region, also known as Regions 7 and 8. In 1996, TriWest was awarded the contract for the TRICARE Central Region and began operations.
The TRICARE Central Region included the following states:
TriWest was awarded an extension to this contract, which continued until 2004.
On August 21, 2003, TriWest was awarded the TRICARE Managed Care Support Contract for the TRICARE West Region. The five-year contract, valued at approximately $10 billion, expanded TriWest's service area to 21 states and 2.7 million beneficiaries with the addition of Alaska, California, Hawaii, northern Idaho, Oregon, and Washington.
On July 13, 2009, TriWest was awarded the contract to continue providing military families access to health care and manage the 21-state TRICARE West Region for the Department of Defense.
On March 16, 2012, it was announced that the T-3 West Region contract was awarded to Minnesota-based UnitedHealth Group. The contract was worth $20.5 billion