Who We Are

TriWest Fast Facts

Fact 1
With the TRICARE West Region contract, TriWest became the largest Department of Defense (DoD) contractor based in the state of Arizona and holds the 16th largest DoD contract in the United States.

Fact 2
TriWest has been a DoD contractor since 1996, received a four-year contract extension in 2002, and was awarded a five-year contract for the new TRICARE West Region in August 2003.

Fact 3
The 2,260,865 sq. mi. TRICARE West Region includes Alaska, Arizona, California, Colorado, Hawaii, Idaho, Iowa*, Kansas, Minnesota, Missouri*, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oregon, South Dakota, Utah, Washington, Wyoming and a portion of western Texas that includes El Paso and the Ft. Bliss area.

Fact 4
The region's population is represented by 173 members of Congress.

Fact 5
TriWest is owned by a holding company, TriWest Alliance.

Fact 6
Included in the TRICARE West Region are

  • approximately 2.7 million TRICARE-eligible beneficiaries
  • a network of approximately 150,000+ providers (as of 05/01/09)
  • seven U. S. Air Force major commands
  • five U. S. Army Medical Centers
  • 10 Veterans Integrated Service Networks
  • one Naval Medical Center
  • five Naval Hospitals
  • nine Naval Clinics
  • 13 Coast Guard Clinics
* Areas not included are certain ZIP codes in the St. Louis, Mo., area and the
   Rock Island Arsenal area in Iowa.