Host Nation Providers: TRICARE Overseas Guide (2026) | TRICARE.com

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## Quick answer A Host Nation Provider is any doctor, hospital, or specialist located outside of the United States that provides medical care to TRICARE beneficiaries. These providers are managed by International SOS and are the primary source of healthcare for military families stationed overseas.

Details

When you are living or traveling outside the 50 United States and the District of Columbia, your healthcare is managed under the **TRICARE Overseas** program. Because there are no U.S. military "network" providers in foreign countries in the same way there are domestically, TRICARE relies on local civilian infrastructure.

### The Overseas Contractor As of 2026, **International SOS (ISOS)** is the sole contractor responsible for the TRICARE Overseas Program (TOP). They maintain a network of vetted Host Nation Providers who meet specific quality standards and agree to direct billing for certain plans.

### Provider Categories 1. **Direct Care:** Care provided inside a military hospital or clinic (Military Treatment Facility) on a base. 2. **Purchased Care (Host Nation):** Care provided by civilian doctors and hospitals in the local economy.

### Coverage by Plan Type * **TRICARE Overseas Program (TOP) Prime:** Active duty service members (ADSMs) and their command-sponsored family members typically have $0 out-of-pocket costs when using a host nation provider, provided they have a referral. * **TOP Select:** Similar to TRICARE Select in the U.S., these beneficiaries can see any host nation provider. However, they must typically pay a deductible and cost-shares. For 2026, these rates vary based on the sponsor’s enlistment date (Group A or Group B). * **TRICARE For Life (TFL):** Outside the U.S., TRICARE is the primary payer because Medicare does NOT provide coverage overseas. TFL beneficiaries using host nation providers usually pay the TRICARE Select deductible and 25% cost-shares (2026 rates).

### Billing and Translation In many "high-volume" locations (like near major bases in Germany, Japan, or South Korea), Host Nation Providers have agreements to bill International SOS directly. In other locations, you may be required to pay the host nation provider upfront in local currency and file a claim for reimbursement. International SOS provides 24/7 translation services to assist with medical communication.

## Who this affects * **Active Duty Service Members:** Stationed OCONUS (Outside Continental United States) or on TDY/deployment. * **Command-Sponsored Families:** Living with their sponsor overseas. * **Retirees and Families:** Living abroad permanently. * **TRICARE For Life Beneficiaries:** Traveling or living outside the U.S. * **Reserve Component:** On active duty orders OCONUS for more than 30 days.

## Sources * **TRICARE.mil:** [Overseas Program Overview](https://www.tricare.mil/overseas) * **International SOS:** [TRICARE Overseas Beneficiary Portal](https://www.tricare-overseas.com/) * **Defense Health Agency (DHA):** [TRICARE Plans Outside the U.S.](https://health.mil/)