ZIP Code Lookup

The ZIP Code Lookup is a TRICARE tool that helps beneficiaries determine their service region, available plans, Prime Service Area status, and regional contractor based on their residential ZIP code. This information is essential for understanding your TRICARE options and accessing the right resources.

What ZIP Code Lookup reveals: • Your TRICARE region (East or West) • Your regional contractor (Humana Military or TriWest) • Whether you are in a Prime Service Area • Available TRICARE plan options for your location • Nearby Military Treatment Facilities • Contact information for your regional office

How to use the ZIP Code Lookup: • Visit the TRICARE website (tricare.mil) • Enter your residential ZIP code • Review the results for region, contractor, and plan options • Save the relevant contact information for your area

Why ZIP code matters for TRICARE: • Determines which contractor manages your benefits • Affects TRICARE Prime eligibility (must be in a Prime Service Area) • Influences provider network availability • May affect plan costs and options • Required for enrollment and address updates in DEERS

Keeping your address current in DEERS ensures that your ZIP code correctly reflects your TRICARE region and available benefits. Update DEERS within 90 days of any address change to maintain accurate coverage information.