How to Contact TRICARE Customer Service (2026 Guide) | TRICARE.com

*TRICARE.com is an independent reference site and is not a government agency. For official policy and the official portal, visit [TRICARE.mil](https://www.tricare.mil).*

## Quick answer To contact TRICARE customer service, you must call the regional contractor assigned to your location: **Humana Military** for the East Region or **TriWest Healthcare Alliance** for the West Region. For pharmacy issues, contact **Express Scripts**, and for overseas assistance, contact **International SOS**.

Details

Effective January 1, 2025, under the T-5 contract, TRICARE shifted its regional management. It is vital to ensure you are calling the correct contractor based on where you live to avoid long hold times or being transferred.

### TRICARE East Region (Humana Military) The East Region includes states from the East Coast through the Midwest (Alabama, Arkansas, Connecticut, Delaware, the District of Columbia, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Mississippi, Missouri, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, and Wisconsin).

* **Customer Service:** 1-800-444-5445 * **Website:** [HumanaMilitary.com](https://www.humanamilitary.com)

### TRICARE West Region (TriWest Healthcare Alliance) The West Region includes the western half of the United States (Alaska, Arizona, California, Colorado, Hawaii, Idaho, Iowa, Kansas, Minnesota, Missouri (western portion), Montana, Nebraska, Nevada, New Mexico, North Dakota, Oregon, South Dakota, Texas (western portion), Utah, Washington, and Wyoming).

* **Customer Service:** 1-888-TRIWEST (1-888-874-9378) * **Website:** [TriWest.com](https://www.triwest.com)

### TRICARE Pharmacy Program (Express Scripts) Regardless of your region, all prescription benefits are managed by Express Scripts. You should contact them for mail-order status, pharmacy network locations, and formulary questions.

* **Customer Service:** 1-877-363-1303 * **Website:** [Express-Scripts.com/TRICARE](https://www.express-scripts.com/tricare)

### TRICARE Overseas (International SOS) If you are stationed or living outside of the 50 United States and the District of Columbia, your contact point is International SOS.

* **Eurasia-Africa:** +44-20-8762-8384 * **Latin America/Canada:** +1-215-942-8393 * **Pacific:** +65-6339-2676 * **Website:** [tricare-overseas.com](https://www.tricare-overseas.com)

### Eligibility and Enrollment (DEERS) If your issue relates to eligibility, ID cards, or personal information updates (such as a change of address or marriage), the regional contractors cannot help you. You must contact the **Defense Enrollment Eligibility Reporting System (DEERS)**.

* **DMDC Support Center:** 1-800-538-9552

## Who this affects * **Active Duty Service Members:** For referrals and authorizations. * **Active Duty Family Members (ADFM):** For claims and enrollment questions. * **Retirees and their Families:** For 2026 enrollment fees and benefit coverage details. * **National Guard and Reserve:** For TRICARE Reserve Select (TRS) billing. * **TRICARE For Life (TFL) Beneficiaries:** For Medicare-wraparound claim assistance.

## Sources * **TRICARE Official Site:** [TRICARE.mil/ContactUs](https://www.tricare.mil/ContactUs) * **Humana Military (East):** [HumanaMilitary.com](https://www.humanamilitary.com) * **TriWest Healthcare Alliance (West):** [TriWest.com](https://www.triwest.com) * **Express Scripts (Pharmacy):** [MilitaryRx.Express-Scripts.com](https://militaryrx.express-scripts.com)