TRICARE Bases & Military Treatment Facilities Guide

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## Quick answer In the TRICARE system, "bases" (Military Treatment Facilities or MTFs) serve as the primary hubs for healthcare delivery, especially for active duty service members and those enrolled in TRICARE Prime. Your proximity to a base determines which TRICARE plans you can join, whether you need a referral for specialty care, and how much you will pay in out-of-pocket costs.

In detail

Military bases house **Military Treatment Facilities (MTFs)**, which range from small troop clinics to massive medical centers like Walter Reed or Brooke Army Medical Center. These facilities are the "heart" of the TRICARE network.

### Prime Service Areas (PSAs) The most critical way bases affect your insurance is through **Prime Service Areas**. A PSA is generally the area within a 40-mile radius (or roughly a one-hour drive) of a military base or hospital. * **Enrolling in Prime:** To enroll in TRICARE Prime, you typically must live within a PSA. * **The "Right of First Refusal":** Even if you have a civilian primary care manager (PCM), the local base has the "right of first refusal" to see you for specialty care. If the base has an opening, you must go there rather than a civilian specialist.

### Regional Contractors by Base Location Depending on where your base is located, a different private contractor manages your claims and network: * **TRICARE East:** Managed by **Humana Military**. Includes bases across the Eastern U.S. (e.g., Fort Liberty, NS Norfolk). * **TRICARE West:** Managed by **TriWest Healthcare Alliance** (as of Jan 1, 2025). Includes bases across the Western U.S. (e.g., JBLM, Camp Pendleton).

### Types of Base Medical Facilities 1. **Military Medical Centers:** Large teaching hospitals with full specialty care (e.g., BAMC in San Antonio). 2. **Military Community Hospitals:** Mid-sized facilities offering inpatient and outpatient services. 3. **Clinics:** Outpatient-only facilities usually focused on primary care and readiness.

### Direct Care vs. Purchased Care * **Direct Care:** Care received inside the base gates at an MTF. There are $0 out-of-pocket costs for any beneficiary category (Active Duty, Retirees, or Dependents) for care received on-base. * **Purchased Care:** Care received from civilian providers in the TRICARE network. Costs vary based on your plan (Select vs. Prime) and your sponsor's status.

## Who this applies to * **Active Duty Service Members (ADSMs):** Mandatory enrollment. They must receive care at the base MTF unless they have a specific waiver or are stationed in a remote area. * **Active Duty Family Members (ADFMs):** Can choose to live near a base to access TRICARE Prime with $0 copays, or live elsewhere and use TRICARE Select. * **Retirees under 65:** Priority for MTF care is "space-available," which is often limited. Most retirees living near bases use the MTF for pharmacy needs to save money. * **TRICARE For Life (TFL) Users:** Can use base pharmacies for $0 copays, but typically receive most medical care from Medicare-participating providers off-base.

Common scenarios

### Scenario 1: The Active Duty Family (Fort Cavazos) An Army family lives on-base at Fort Cavazos in 2026. They are enrolled in TRICARE Prime. All primary care, pediatric appointments, and medications are handled at the Carl R. Darnall Army Medical Center. Their out-of-pocket cost for all medical care this year is **$0**.

### Scenario 2: The Retiree (Near NAS Jacksonville) A retired Navy Commander lives 10 miles from NAS Jacksonville. He is enrolled in TRICARE Select. He sees a civilian cardiologist in town and pays a 2026 cost-share (approximately $38-$50 per visit depending on Group A/B status). However, he drives onto the base to fill his prescriptions at the MTF pharmacy to pay **$0** instead of the Express Scripts mail-order or retail copays.

### Scenario 3: Moving "Away" from a Base A Marine family moves from Camp Lejeune to a rural area 100 miles from the nearest base. Because they are no longer in a Prime Service Area, they may switch to **TRICARE Select** or **TRICARE Prime Remote**. They will now see civilian doctors and likely face higher out-of-pocket deductibles and cost-shares in 2026.

## Related terms * **MTF (Military Treatment Facility):** Any clinic or hospital located on a military installation. * **PSA (Prime Service Area):** The geographic area around a base where TRICARE Prime is offered. * **PCM (Primary Care Manager):** The specific doctor at the base (or in the network) who coordinates all your care. * **Space-Available Care:** Medical care provided to non-active duty patients at an MTF only when the facility has extra room/time. * **T-5 Contract:** The 2025/2026 regional contract framework where TriWest (West) and Humana (East) manage the networks.

## Sources * **TRICARE.mil MTF Locator:** [https://tricare.mil/mtf](https://tricare.mil/mtf) * **Defense Health Agency (DHA):** [https://health.mil/Military-Health-Topics/Access-Cost-Quality-and-Safety/Access-to-Healthcare/Prime-Service-Areas](https://health.mil/Military-Health-Topics/Access-Cost-Quality-and-Safety/Access-to-Healthcare/Prime-Service-Areas) * **Humana Military (East Contractor):** [https://www.humanamilitary.com/](https://www.humanamilitary.com/) * **TriWest Healthcare Alliance (West Contractor):** [https://www.triwest.com/](https://www.triwest.com/)