TRICARE Idaho: Mountain Home AFB & West Region Guide | TRICARE.com

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## TRICARE in Idaho Idaho is part of the **TRICARE West Region**. As of January 1, 2025, the regional contractor for the West is **TriWest Healthcare Alliance**, which replaced Health Net Federal Services (HNFS). Beneficiaries in Idaho, including those stationed at Mountain Home AFB or serving in the Idaho National Guard, manage their care and authorizations through the TriWest portal.

## Major military installations While Idaho has a large National Guard presence across the state, the primary active-duty hub is located in the southwestern corner of the state:

* **Mountain Home Air Force Base (AFB):** U.S. Air Force – near Mountain Home/Boise (Home of the 366th Fighter Wing). * **Gowen Field:** Idaho Air National Guard / Army National Guard – Boise. * **Naval Reactors Facility (Idaho National Laboratory):** U.S. Navy – near Idaho Falls (focused on naval nuclear propulsion).

## Plans available in Idaho Beneficiaries in Idaho have access to the following TRICARE plans based on their status and location:

| Plan | Eligibility | Notes for Idaho Residents | | :--- | :--- | :--- | | **TRICARE Prime** | Active Duty, Guard/Reserve on active orders | Available near Mountain Home AFB and Boise. Must use MTF or network providers. | | **TRICARE Prime Remote** | Active Duty in remote areas | Available for those stationed away from Mountain Home AFB (e.g., North Idaho or Idaho Falls). | | **TRICARE Select** | Active Duty Families, Retirees | Maximum flexibility to see any TRICARE-authorized provider without a referral. | | **TRICARE Reserve Select (TRS)** | Qualified Selected Reserve | Common for Idaho National Guard members; requires monthly premiums. | | **TRICARE Retired Reserve** | Retired Reserve under age 60 | For "Gray Area" retirees living in Idaho. | | **TRICARE For Life (TFL)** | Dual-eligible for Medicare & TRICARE | Standard for Idaho retirees 65+; acts as a secondary payer to Medicare. | | **TRICARE Young Adult** | Adult children up to age 26 | Available in Prime or Select formats. |

## Finding care in Idaho To find a doctor in Idaho, you should use the **TriWest Healthcare Alliance West Region Provider Directory**.

* **Mountain Home AFB Focus:** Most Prime enrollees at Mountain Home AFB will receive primary care at the **366th Medical Group**. For specialty care not available on base, the 366th Medical Group will issue a referral to a civilian specialist in the Mountain Home or Boise/Meridian area. * **Boise/Meridian Network:** There is a robust network of TRICARE-authorized providers in the Treasure Valley. Use "Network" providers to keep your out-of-pocket costs at the lowest 2026 rates. * **Telehealth:** TriWest offers a telehealth network for Idaho residents, which is particularly useful for those in rural Eastern or Northern Idaho where specialty care (like mental health) may be limited.

Common questions for Idaho beneficiaries

**I am PCSing to Mountain Home AFB. How do I switch my care?** You should contact TriWest Healthcare Alliance once you have arrived in Idaho to update your address and primary care manager (PCM). If you are moving from the East Region (Humana Military), your records will transition to the West Region. Ensure your DEERS information is updated immediately upon arrival.

**Does Idaho Medicaid work with TRICARE?** Yes. If you are eligible for both TRICARE and Idaho Medicaid (often the case for some families with special needs), TRICARE pays first and Medicaid is the "payer of last resort."

**What if I live in Coeur d'Alene or Idaho Falls?** Because these areas are far from Mountain Home AFB, most active-duty families will use **TRICARE Prime Remote**. You will typically see civilian network providers for all care, rather than traveling to a military base.

## Sources * **TRICARE West Region (TriWest):** [https://www.triwest.com](https://www.triwest.com) * **366th Medical Group - Mountain Home AFB:** [https://mountainhome.tricare.mil/](https://mountainhome.tricare.mil/) * **TRICARE Official Site:** [https://www.tricare.mil](https://www.tricare.mil) * **Defense Enrollment Eligibility Reporting System (DEERS):** [https://idco.dmdc.osd.mil/idco/](https://idco.dmdc.osd.mil/idco/)