TRICARE West Region: 2026 Guide to TriWest & Benefits
The **TRICARE West Region** is one of two primary management geographic areas for military healthcare in the United States, covering 26 states. As of 2026, healthcare delivery and network management in this region are managed by **TriWest Healthcare Alliance** under the T-5 contract. If you live in the West, your primary points of contact for authorizations, referrals, and provider directories are TriWest and your local Military Treatment Facility (MTF).
*Note: TRICARE.com is an independent reference site and is not affiliated with the Department of Defense or the official TRICARE program. For official policy, visit TRICARE.mil.*
In detail
The West Region covers roughly half of the United States. Following the transition to the "T-5" contract on January 1, 2025, the region saw major administrative shifts, most notably the transition of management from Health Net Federal Services (HNFS) to TriWest Healthcare Alliance.
### Geography of the West Region The West Region encompasses the following 26 states: Alaska, Arizona, Arkansas, California, Colorado, Hawaii, Idaho, Iowa, Kansas, Louisiana, Minnesota, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas (Western areas, including El Paso), Utah, Washington, Wyoming, and Wisconsin.
### Regional Contractor: TriWest Healthcare Alliance TriWest is responsible for: * Developing and maintaining the network of civilian providers. * Processing claims for healthcare services. * Managing the prior authorization and referral process. * Providing customer service and a secure member portal for beneficiaries.
### Plans Available in the West Region Beneficiaries in the West Region can enroll in several plan types, provided they meet eligibility requirements: * **TRICARE Prime:** A managed-care option similar to an HMO. Most care is received at an MTF or through a primary care manager (PCM). * **TRICARE Select:** A self-managed, preferred provider organization (PPO) model that allows more flexibility in choosing providers. * **TRICARE For Life:** For those with Medicare Part A and B; TriWest acts as the secondary payer to Medicare in the West Region. * **TRICARE Reserve Select/Retired Reserve:** For qualified National Guard and Reserve members.
### 2026 Enrollment Costs and Copays (Group A) Costs vary based on the beneficiary's "Group" status (based on the sponsor's initial enlistment or appointment date). Below are 2026 examples for Group A:
| Feature | TRICARE Prime (Active Duty Family) | TRICARE Select (Retirees) | | :--- | :--- | :--- | | **Annual Enrollment Fee** | $0 | ~$380 (Individual) / ~$760 (Family) | | **Annual Deductible** | $0 | $150 (Individual) / $300 (Family) | | **Primary Care Visit** | $0 (with referral) | ~$35 (In-network) | | **Specialty Care Visit**| $0 (with referral) | ~$50 (In-network) | | **Emergency Room** | $0 | ~$140 (In-network) |
*Always verify exact 2026 rates at TRICARE.mil as figures are subject to annual adjustments.*
Who this applies to
* **Active Duty Service Members (ADSMs):** Stationed at bases within the 26 West Region states; they must enroll in TRICARE Prime and use TriWest for any civilian care referrals. * **Active Duty Family Members (ADFMs):** Living in the West Region; they choose between Prime (managed care) and Select (freedom of choice). * **Retirees and their Families:** Living in the West Region; they must pay annual enrollment fees for Prime or Select or transition to TRICARE For Life at age 65. * **National Guard and Reserve:** Members living in the West Region who are eligible for TRICARE Reserve Select (TRS).
Common scenarios
**1. Moving from East to West:** In May 2026, a Coast Guard family moves from Virginia (East Region/Humana) to California (West Region/TriWest). Because this is a "Qualifying Life Event," they must proactively update their address in DEERS and contact TriWest to enroll in a West Region plan. Their coverage does not automatically follow them; failing to register with TriWest could result in denied claims.
**2. A Retiree seeking a Specialist:** A retired Army officer in Arizona on **TRICARE Select** needs to see a cardiologist. In 2026, they do not need a referral from TriWest. They use the TriWest online provider directory to find an "In-Network" specialist. Because they are on Select, they will pay a copay (roughly $50 in 2026) but have the flexibility to book the appointment directly.
**3. Active Duty Emergency:** An Airman stationed in Washington State has an emergency while hiking during a weekend off. They go to the nearest civilian ER. Because it is a true emergency, TriWest will process the claim, though the Airman should notify their PCM or TriWest within 24 hours to ensure follow-up care is authorized.
Related terms
* **TriWest Healthcare Alliance:** The current (as of 2026) private contractor managing the TRICARE West Region. * **T-5 Contract:** The fifth generation of TRICARE contracts which reorganized the regions and contractors starting in 2025. * **Military Treatment Facility (MTF):** A military hospital or clinic located on a base, which serves as the primary hub for TRICARE Prime enrollees. * **DEERS:** The Defense Enrollment Eligibility Reporting System; the database that proves you are eligible for TRICARE. * **Network Provider:** A civilian doctor or hospital that has a contract with TriWest to provide care at pre-negotiated rates.
Sources
* **TRICARE.mil - West Region:** https://www.tricare.mil/west * **TriWest Healthcare Alliance (Official Site):** https://www.triwest.com/ * **Defense Health Agency (DHA):** https://health.mil/