TRICARE Idaho: Plans, Providers, and Regional Info | TRICARE.com

TRICARE in Idaho

Idaho is part of the **TRICARE West Region**. Since January 1, 2025, the TRICARE West regional contractor has been **TriWest Healthcare Alliance**, which replaced Health Net Federal Services (HNFS). While Idaho is a large state geographically, its military population is concentrated near Boise and Mountain Home, requiring beneficiaries in rural areas to pay close attention to network provider availability.

*Note: TRICARE.com is an independent reference site and is not an official government entity. For official policy and enrollment, visit TRICARE.mil.*

Major military installations

Idaho’s military presence is anchored by a major Air Force base and several significant National Guard facilities:

* **Mountain Home Air Force Base** – Mountain Home (Elmore County) * **Gowen Field Air National Guard Base** – Boise * **Orchard Combat Training Center** – Near Boise (Idaho Army National Guard) * **Naval Surface Warfare Center (Acoustic Research Center)** – Bayview (Lake Pend Oreille)

Plans available in Idaho

Depending on your status (Active Duty, National Guard, or Retiree), the following plans are available to Idaho residents:

| Plan | Best For | Idaho Note | | :--- | :--- | :--- | | **TRICARE Prime** | Active Duty and families near bases | Available in "Prime Service Areas" (PSAs) near Boise and Mountain Home. | | **TRICARE Prime Remote** | Families in rural Idaho | Available if you live more than 50 miles or one hour from a military hospital. | | **TRICARE Select** | Those who want doctor choice | Allows you to see any TRICARE-authorized provider in the state without a referral. | | **TRICARE Reserve Select (TRS)** | Qualified National Guard members | Premium-based plan for Idaho National Guard members not on active duty. | | **TRICARE For Life (TFL)** | Retirees with Medicare Parts A & B | Coverage for Idaho retirees age 65+; works at any provider that accepts Medicare. | | **TRICARE Young Adult** | Adult children (ages 21–25) | Available in Prime or Select formats for qualifying dependents. |

*Note: The US Family Health Plan (USFHP) is **not** available in Idaho.*

Finding care in Idaho

Because Idaho has vast rural stretches, finding a network provider can vary significantly by ZIP code.

* **Network Providers:** These doctors have an agreement with TriWest (West Region) to provide care at established 2026 rates. You will typically have lower out-of-pocket costs and no need to file your own paperwork. * **Non-Network Providers:** If you are using TRICARE Select, you can see non-network providers, but your cost-share will be higher. * **Provider Directory:** Beneficiaries should use the [TriWest Provider Directory](https://www.triwest.com) to find local Idaho specialists, urgent care, and mental health professionals. * **Telehealth:** Given Idaho's geography, TRICARE covers many telehealth services. Check with TriWest to ensure your provider is authorized to practice across state lines if they are located in nearby Washington or Utah.

Common questions for Idaho beneficiaries

**I am PCSing to Mountain Home AFB. When do I switch to TriWest?** You should contact TriWest as soon as you arrive in Idaho to update your enrollment. You do not need to wait for a specific enrollment season when you have a Qualifying Life Event (QLE) like a Permanent Change of Station (PCS).

**Can I use the VA Medical Center in Boise?** The Boise VA Medical Center primarily serves Veterans, but under certain TRICARE programs or specific agreements, it may offer services. However, TRICARE Prime beneficiaries usually seek care at the 366th Medical Group (Mountain Home AFB) or civilian network providers.

**How does TRICARE work with Idaho Medicaid?** By law, TRICARE is the secondary payer to most other health insurance plans, but it is the **primary** payer to Medicaid. If you are eligible for both in Idaho, TRICARE pays first and Medicaid pays last.

## Sources * TRICARE West Region (TriWest): [https://www.triwest.com](https://www.triwest.com) * Mountain Home Air Force Base 366th Medical Group: [https://mountainhome.tricare.mil](https://mountainhome.tricare.mil) * Official TRICARE Plan Finder: [https://tricare.mil/Plans/PlanFinder](https://tricare.mil/Plans/PlanFinder) * Defense Health Agency: [https://health.mil](https://health.mil)