Military Health System (MHS) Guide: TRICARE & MTFs

The **Military Health System (MHS)** is the massive global network of medical clinics, hospitals, and administrative bodies that provides healthcare for nearly 9.6 million U.S. service members, retirees, and their families. It is comprised of two parts: "direct care" (military hospitals and clinics) and "purchased care" (the TRICARE private-sector network).

*Note: TRICARE.com is an independent reference site and is not the official TRICARE program or the Defense Health Agency. For official policy and records, visit TRICARE.mil.*

In Detail

The MHS is one of the largest healthcare systems in the world, managed by the **Defense Health Agency (DHA)**. It operates on a dual mission: maintaining the medical readiness of the force (ensuring troops are fit to deploy) and providing a comprehensive health benefit to families and retirees.

### 1. Direct Care vs. Purchased Care * **Direct Care (Military Medical Treatment Facilities - MTFs):** These are hospitals and clinics located on military installations. They are staffed by military and civilian personnel. Under the T-5 contract (effective Jan 1, 2025), MTFs remain the primary hub for TRICARE Prime enrollees. * **Purchased Care (TRICARE):** When care cannot be provided at an MTF, the MHS "purchases" it from civilian providers. This network is managed by regional contractors: **Humana Military** in the East and **TriWest Healthcare Alliance** in the West.

### 2. Governance and Oversight The MHS is overseen by the Assistant Secretary of Defense for Health Affairs. However, the **Defense Health Agency (DHA)** manages the day-to-day operations of all MTFs and the TRICARE health plan. This centralized management was solidified in the 2024-2025 transition to ensure a standardized experience across all branches of service (Army, Navy, Air Force, Coast Guard, etc.).

### 3. Integrated IT Systems: MHS GENESIS The backbone of the MHS is **MHS GENESIS**, the single electronic health record (EHR) for the entire Department of Defense. As of 2026, MHS GENESIS is fully deployed worldwide, allowing your medical records to follow you seamlessly between military clinics and participating civilian TRICARE providers.

Who This Applies To

* **Active Duty Service Members (ADSMs):** Must receive all care through the MHS, usually starting at an MTF. * **Active Duty Family Members (ADFMs):** Can choose between MTF-centered care (Prime) or civilian-centered care (Select). * **Retirees and Families:** Access MTFs on a space-available basis; most rely on the purchased care (civilian) network via TRICARE Select or TRICARE For Life. * **National Guard and Reserve:** Access the MHS when on active duty orders or through TRICARE Reserve Select (TRS).

Common Scenarios

**The Active Duty Specialist:** SPC Smith is stationed at Fort Liberty. He experiences knee pain during training. He enters the MHS through his **MTF (Direct Care)**. His surgery and physical therapy are performed by Army doctors at Womack Army Medical Center. His out-of-pocket cost in 2026 is **$0**.

**The Retired Couple in the West Region:** John, a 55-year-old retiree, lives 50 miles from the nearest base in Arizona. He uses **TRICARE Select**. Since he is outside the "Direct Care" catchment area, he sees a civilian primary care doctor in the **TriWest** network. For a 2026 office visit, he pays a negotiated copay (roughly $38–$45 depending on his group status).

**The Overseas Family:** A Navy family stationed in Italy uses the MHS via **International SOS**. They receive primary care at a small base clinic (Direct Care) but are referred to a local Italian hospital (Purchased Care) for specialized maternity services, coordinated by the MHS overseas contractor.

Related Terms

* **Defense Health Agency (DHA):** The joint agency that manages MTFs and the TRICARE health plan. * **MTF (Military Medical Treatment Facility):** Any clinic or hospital owned and operated by the Department of Defense. * **T-5 Contract:** The 2025-2028 regional contracts that replaced previous agreements, notably bringing TriWest in as the West region manager. * **MHS GENESIS:** The unified electronic health record system used by the DoD, VA, and Coast Guard. * **Purchased Care:** Healthcare services provided by civilian doctors but paid for by the MHS/TRICARE.

## Sources * **TRICARE.mil:** [About the Military Health System](https://www.tricare.mil/About) * **Health.mil:** [Official MHS Fact Sheets](https://health.mil/News/Gallery/Fact-Sheets) * **DHA:** [Defense Health Agency Overview](https://health.mil/About-MHS/OASDHA/Defense-Health-Agency)