How do I know what region I’m in?

 

Where you live determines your region. Regions only apply to the following health plans:

  • TRICARE Prime
  • TRICARE Prime Overseas
  • TRICARE Select
  • TRICARE Select Overseas
  • TRICARE Young Adult
  • TRICARE Reserve Select
  • TRICARE Retired Reserve
If you live in:   You're a part of the:  

 Alaska
 Arkansas*
 Arizona
 California
 Colorado
 Hawaii
 Idaho
 Indiana*
 Illinois
 Iowa
 Kansas
 Louisiana
 Minnesota
 Missouri*
 Montana
 Nebraska 
 Nevada 
 New Mexico 
 North Dakota 
 Oklahoma
 Oregon 
 South Dakota 
 Texas
 Utah
 Washington
 Wisconsin*
 Wyoming

 West Region

 West Region Contractor:
 TriWest Healthcare Alliance
 888-TRIWEST (874-9378)
 TRICARE West Region website

 * Some ZIP codes in Arkansas, Indiana, Missouri, and Wisconsin are in the East Region. 

Check to see if your ZIP code is in the East or West by going to Regions. In the far-right navigation bar, enter your ZIP code into the tool called “What’s my TRICARE region in 2025?”

 

 

If you live in:  You're a part of the: 
 Alabama
 Arkansas*
 Connecticut
 Delaware
 District of Columbia
 Florida
 Georgia
 Indiana*
 Kentucky
 Maine
 Maryland
 Massachusetts
 Michigan
 Mississippi
 Missouri*
 New Hampshire
 New Jersey
 New York
 North Carolina
 Ohio
 Pennsylvania
 Rhode Island
 South Carolina
 Tennessee
 Vermont
 Virginia
 West Virginia
 Wisconsin*
 

 East Region

 East Region Contractor:
 Humana Military
 800-444-5445
 TRICARE East Region website

 *Some ZIP codes in Arkansas, Indiana, Missouri, and Wisconsin are in the West Region. 

 Check to see if your ZIP code is in the East or West by going to Regions. In the far-right navigation bar, enter your ZIP code into the tool called “What’s my TRICARE region in 2025?”

 Note: If you live in Atlanta or Tampa and are enrolled in the TRICARE Prime Demo, your contractor is:

 Care Source Military and Veterans
 
833-230-2080
 CSMV TRICARE Prime Demo website

 

 

 If you live:  You're a part of the:
 Outside the United States

 Overseas Region

 Overseas Contractor:
 International SOS Government Services, LLC.
 Country-specific toll-free numbers
 International SOS TRICARE Overseas website

 

 


Last Updated 10/23/2025