Independent guide
TRICARE regions
East, West, and Overseas use different contractors. Start with the contractor for where you live.
Last reviewed October 2, 2026 ยท Confirm time-sensitive details with the official program.
Official decisions come from TRICARE. This guide helps organize public information; verify eligibility, coverage, deadlines, costs, and contacts at TRICARE.mil.
Three regions, three contractors
The East Region is administered by Humana Military. The West Region is administered by TriWest Healthcare Alliance. The Overseas Region uses country-specific contacts.
Your region decides who handles enrollment, referrals, and claims. The phone numbers we publish are on the phone numbers page. The official map and overseas contacts are on TRICARE.mil.