TRICARE.com

TRICARE and Military Bases: MTFs, PSAs, and Care Rules

Learn how military bases impact TRICARE eligibility, the T-5 TriWest transition, Prime Service Areas (PSAs), and how to access $0 copay care in 2026.

TRICARE and Military Bases: MTFs, PSAs, and Care Rules

*TRICARE.com is an independent reference site and is not the official TRICARE program or a government entity. For official policy and enrollment, visit TRICARE.mil.*

## Quick answer Military bases serve as the primary hubs for healthcare delivery within the TRICARE system, housing Military Medical Treatment Facilities (MTFs) where active duty service members and many retirees receive care. Your proximity to a base often determines your TRICARE plan eligibility, specifically whether you can enroll in a "Prime" plan or if you must use "Select."

In detail

In the TRICARE universe, "bases" are more than just duty stations; they are the geographic centers of the **Prime Service Areas (PSAs)**. Your distance from a military base dictates your out-of-pocket costs and your access to military doctors.

### Military Medical Treatment Facilities (MTFs) Every major military base typically hosts an MTF, which can range from a small clinic to a major medical center (like Walter Reed or Brooke Army Medical Center). * **Direct Care:** This refers to care received at a base MTF. There are generally $0 out-of-pocket costs for care received inside the base gates for any TRICARE beneficiary. * **Priority of Care:** MTFs follow a strict priority system: 1. Active Duty Service Members (ADSMs). 2. Active Duty Family Members (ADFMs) enrolled in TRICARE Prime. 3. Retirees and their families enrolled in TRICARE Prime. 4. All other eligible beneficiaries (on a space-available basis).

### Prime Service Areas (PSAs) A PSA is a geographic area, usually defined by a series of ZIP codes within a 40-mile radius of a military base or clinic. * **Living "On-Base" or Nearby:** If you live within a PSA, you are generally required to enroll in TRICARE Prime if you want managed care with lower out-of-pocket costs. * **Living Far from a Base:** If you live more than 40 miles from a base, you may be eligible for **TRICARE Prime Remote** or you may choose **TRICARE Select**, which allows you to see any TRICARE-authorized civilian provider but involves higher deductibles.

### Regional Contractors by Base Location As of 2026, the management of healthcare services surrounding bases is split between two contractors: * **East Region Bases:** Managed by **Humana Military**. Includes bases in states like Florida, North Carolina, and Virginia. * **West Region Bases:** Managed by **TriWest Healthcare Alliance**. Includes bases in states like California, Texas (parts), and Colorado. Note: TriWest assumed full control of the West Region under the T-5 contract on January 1, 2025.

### Base Access for Pharmacy Services Most bases have a pharmacy that provides medications at **$0 copay** for all TRICARE beneficiaries. Even if you see a civilian doctor off-base, you can often have your prescription filled at the base pharmacy to save money. For 2026, using a base pharmacy remains the most cost-effective option compared to Express Scripts delivery or retail pharmacies.

## Who this applies to * **Active Duty Service Members:** Required to receive care at the base MTF unless referred elsewhere. * **Active Duty Families:** Their choice of plan (Prime vs. Select) is often dictated by how close they live to the base. * **Retirees under 65:** Priority for "space-available" care at the base; proximity determines if they can remain on a Prime plan. * **TRICARE For Life (TFL) Users:** While they use Medicare, they can still use base pharmacies for $0 copays.

Common scenarios

**Scenario 1: Living on Joint Base San Antonio (West Region)** An Active Duty Family Member (ADFM) lives on-base. They are enrolled in TRICARE Prime. Their primary care manager (PCM) is a military doctor at the base clinic. Their 2026 enrollment fees and copays for all base visits are **$0**.

**Scenario 2: Living 50 miles from Fort Liberty (East Region)** A retired Army veteran lives 50 miles from the base (outside the PSA). Because they are outside the 40-mile radius, they cannot easily enroll in TRICARE Prime. They use **TRICARE Select**. For a 2026 outpatient visit to a civilian specialist, they might pay a 20–25% cost-share after meeting their deductible.

**Scenario 3: Pharmacy Run to Hill Air Force Base** A TFL beneficiary (age 67) sees a civilian cardiologist off-base. The civilian doctor writes a prescription. Instead of paying a $16–$43 copay at a retail pharmacy (2026 estimated rates), the beneficiary drives to the Hill AFB pharmacy and receives the medication for **$0**.

## Related terms * **MTF (Military Medical Treatment Facility):** A clinic or hospital located on a military installation. * **PSA (Prime Service Area):** The 40-mile radius around a base where Prime coverage is offered. * **PCM (Primary Care Manager):** The doctor assigned to you, often located at the base MTF for Prime enrollees. * **Direct Care:** Medical services provided by military personnel within a base facility. * **Referral:** An authorization from a base doctor to see a specialist, often in the civilian "purchased care" network.

## Sources * TRICARE.mil - Finding a Facility: https://www.tricare.mil/mtf * Humana Military (East Contractor): https://www.humanamilitary.com/ * TriWest Healthcare Alliance (West Contractor): https://www.triwest.com/ * Defense Health Agency - T-5 Contract Info: https://health.mil/Military-Health-Topics/Business-Support/Partnering-with-the-DHA/T5-Contract-Transition