TRICARE Phone Numbers: Regional & Service Contacts 2026

*Note: TRICARE.com is an independent reference site and is not affiliated with the Department of Defense. For the official government portal, visit TRICARE.mil.*

## Quick answer The most important phone numbers for TRICARE beneficiaries depend on your region: call **Humana Military (1-800-444-5445)** for the East Region or **TriWest Healthcare Alliance (1-888-TRIWEST)** for the West Region. For prescriptions, contact **Express Scripts (1-877-363-1303)**, and for the 24/7 Nurse Advice Line, call **1-800-TRICARE (874-2273), Option 1**.

## In detail Navigating the TRICARE phone system requires knowing which regional contractor manages your benefits. Since the T-5 contract transition on January 1, 2025, TriWest Healthcare Alliance has replaced Health Net Federal Services (HNFS) as the West Region manager.

### Regional Contractor Contact Information These numbers handle enrollment, billing, claims status, and referrals for TRICARE Prime and Select.

* **TRICARE East Region (Humana Military):** 1-800-444-5445 * *States:* AL, AR, CT, DE, DC, FL, GA, IL, IN, KY, LA, ME, MD, MA, MI, MS, MO, NH, NJ, NY, NC, OH, OK, PA, RI, SC, TN, TX (East), VT, VA, WV, WI. * **TRICARE West Region (TriWest Healthcare Alliance):** 1-888-TRIWEST (1-888-874-9378) * *States:* AK, AZ, CA, CO, HI, ID, IA, KS, MN, MT, NE, NV, NM, ND, OR, SD, TX (West/Panhandle), UT, WA, WY.

### Specialized Service Numbers Depending on the type of care or benefit needed, you may need to bypass the regional contractor:

### Overseas Contact Information TRICARE Overseas is managed by International SOS. Because phone numbers vary by country, the primary contact point is the Regional Support Center (RSC): * **Eurasia-Africa:** +44-20-8762-8384 * **Latin America/Canada:** +1-215-942-8393 * **Pacific:** +65-6339-2676

## Who this applies to * **Active Duty Service Members (ADSMs):** Use the Nurse Advice Line for urgent care authorization when away from a Military Hospital. * **Active Duty Family Members (ADFMs):** Contact regional contractors to change Primary Care Managers (PCMs) or track claims. * **Retirees (Under 65):** Use regional numbers for billing (2026 enrollment fees for Group A Select are approximately $190.50/individual or $381/family). * **Retirees (65+):** Focus on the TRICARE For Life / WPS line for supplemental coverage questions. * **National Guard & Reserve:** Use the DEERS line to verify eligibility after activation or deactivation.

## Common scenarios 1. **Lost in the West Region:** A Navy family in San Diego needs to check a referral status in May 2026. Because TriWest took over the West contract in 2025, they must call 1-888-874-9378, not the old Health Net number. 2. **Middle-of-the-Night Fever:** A TRICARE Select beneficiary in Virginia is unsure if their toddler needs the ER. They call the Nurse Advice Line (1-800-874-2273) at 2:00 AM. The service is $0 for all TRICARE plans. 3. **Prescription Refill:** A retiree in Texas needs to move a maintenance medication to Home Delivery to save on 2026 copays (currently $16 for generic via mail vs. $20 at retail). They call Express Scripts at 1-877-363-1303 to initiate the transfer.

## Related terms * **DEERS:** The Defense Enrollment Eligibility Reporting System; the database that proves you are eligible for TRICARE. * **PCM:** Primary Care Manager; the doctor who coordinates your care (Prime members). * **Referral:** Official authorization from your regional contractor to see a specialist. * **T-5 Contract:** The fifth generation of TRICARE contracts which began implementation in 2025. * **WPS:** Wisconsin Physicians Service; the contractor that processes TRICARE For Life claims.

## Sources * TRICARE.mil Contact Directory: https://www.tricare.mil/contactus/callus * Humana Military (East): https://www.humanamilitary.com/ * TriWest Healthcare Alliance (West): https://www.triwest.com/ * Express Scripts TRICARE Pharmacy: https://militaryrx.express-scripts.com/