TRICARE.com

TRICARE and Military Bases: MTFs & Prime Service Areas

Guide to TRICARE base services, MTFs, and Prime Service Areas for 2026. Learn how living near a base affects your plan choice and out-of-pocket costs.

TRICARE and Military Bases: MTFs & Prime Service Areas

*Disclaimer: 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.*

## Quick answer In the TRICARE system, military bases serve as the primary hubs for care through Military Medical Treatment Facilities (MTFs). Whether you live on or near a base determines your "Prime Service Area" (PSA) and whether you are required to enroll in TRICARE Prime, which offers the lowest out-of-pocket costs at the expense of choosing your own doctor.

In detail

Military bases are the foundation of the TRICARE "direct care" system. The availability of services at a specific base dictates which TRICARE plans you can join and how much you will pay for healthcare.

### Military Medical Treatment Facilities (MTFs) Every major base houses an MTF, which can range from a small clinic to a massive medical center like Walter Reed. - **Direct Care:** This refers to care received inside the base gates from military providers. It is $0 out-of-pocket for all TRICARE beneficiaries (except for some small subsistence fees for inpatient stays). - **Purchased Care:** This refers to the network of civilian doctors outside the base.

### The 40-Mile Rule (Prime Service Areas) A Prime Service Area (PSA) is generally a 40-mile radius around a military base or a base that was closed during Base Realignment and Closure (BRAC). * **If you live within a PSA:** You are usually encouraged or required (if Active Duty) to enroll in TRICARE Prime. * **If you live outside a PSA:** You may be ineligible for TRICARE Prime and must enroll in TRICARE Select, or use TRICARE Prime Remote.

### Regional Contractors by Base Location As of May 2026, the contractor managing the provider networks around these bases depends on the region: * **TRICARE East (Humana Military):** Covers bases in states from the East Coast to the Mississippi River and parts of Texas. * **TRICARE West (TriWest Healthcare Alliance):** Covers bases in the Western U.S., including Alaska and Hawaii. *Note: TriWest assumed full operations on January 1, 2025.*

### Base Pharmacy vs. Retail One of the largest benefits of being near a base is the pharmacy. * **Base Pharmacy:** $0 copay for all formulary prescriptions. * **Retail/Home Delivery (2026 Rates):** Copays for a 30-day supply at retail pharmacies are typically $16 for generics and $43 for brand names. Using the base pharmacy saves a family hundreds of dollars annually.

Who this applies to

* **Active Duty Service Members (ADSMs):** Required to receive care at the base MTF if they live in a PSA. They have $0 out-of-pocket costs. * **Active Duty Family Members (ADFMs):** Can choose TRICARE Prime (using the base) or TRICARE Select (using civilian doctors). * **Retirees and their Families:** Living near a base allows for "Space-Available" care at MTFs, though Prime enrollees get priority over those on Select. * **TRICARE Reserve Select (TRS) Members:** Generally use civilian providers but may access base pharmacies and some base-specific specialty services.

Common scenarios

**Scenario 1: Living on-base at Fort Liberty (East Region)** An Active Duty family living on-base is enrolled in TRICARE Prime. They see a primary care manager (PCM) at the Womack Army Medical Center. Their 2026 out-of-pocket cost for a specialist referral and three prescriptions filled at the base pharmacy is **$0**.

**Scenario 2: Moving away from a base** A retired Navy Commander moves to a rural area 60 miles from the nearest base. Because they are outside the 40-mile PSA, they must switch from TRICARE Prime to TRICARE Select. For a 2026 doctor's visit, they may pay a **$30–$40 copay** (depending on Group A or B status) because they are no longer using the base MTF.

**Scenario 3: Using the "Space-A" benefit** A retiree on TRICARE Select lives near Nellis Air Force Base. While they usually see a civilian heart doctor, they go to the Nellis base pharmacy to pick up their maintenance medications. By avoiding the retail pharmacy network, they save **$43 per Brand Name prescription** in 2026 fees.

Related terms

* **MTF (Military Medical Treatment Facility):** A clinic or hospital located on a military installation. * **PSA (Prime Service Area):** The geographic area (usually 40 miles) around a base where TRICARE Prime is offered. * **PCM (Primary Care Manager):** The doctor at the base clinic responsible for your basic care and referrals. * **Direct Care:** Medical care provided specifically by military personnel at a base facility. * **Space-Available Care:** Care provided to non-Prime beneficiaries at an MTF only if there are open appointments.

Sources

* TRICARE.mil: Find a Military Hospital or Clinic (https://www.tricare.mil/mtf) * Humana Military (East): (https://www.humanamilitary.com/) * TriWest Healthcare Alliance (West): (https://www.triwest.com/) * Defense Health Agency: TRICARE Pharmacy Program (https://health.mil/Military-Health-Topics/Access-Cost-Quality-and-Safety/Access-to-Healthcare/Pharmacy-Program)