Which states changed TRICARE regions in 2025?
Quick Answer
In 2025, Arkansas, Illinois, Louisiana, Oklahoma, Texas, and Wisconsin moved from the TRICARE East Region (Humana Military) to the West Region (TriWest Healthcare Alliance). Beneficiaries in these states now use TriWest for claims and provider networks.
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Key Takeaways
- AR, IL, LA, OK, TX, and WI moved from East to West Region in 2025
- TriWest Healthcare Alliance is now the contractor for these states
- Benefits and coverage remain the same despite the region change
- Verify your providers are in the TriWest network
Detailed Answer
Effective January 1, 2025, the Defense Health Agency realigned TRICARE regional boundaries, moving six states from the East Region to the West Region.
States That Changed from East to West
- Arkansas (AR)
- Illinois (IL)
- Louisiana (LA)
- Oklahoma (OK)
- Texas (TX)
- Wisconsin (WI)
What This Means for Beneficiaries
- Your TRICARE contractor changed from Humana Military to TriWest Healthcare Alliance
- Provider networks may have changed in your area
- Claims are now processed by TriWest instead of Humana Military
- Your TRICARE benefits and coverage remain the same
Impact on Your Care
- You may need to verify your providers are in the TriWest network
- Referrals and authorizations now go through TriWest
- Contact information for customer service has changed
- ID cards and enrollment status remain valid
Current TRICARE Regions (2025-2026)
- East Region (Humana Military): States east of the Mississippi (minus IL and WI) plus DC
- West Region (TriWest Healthcare Alliance): States west of the Mississippi plus AR, IL, LA, OK, TX, WI
- Overseas: International SOS
Actions You Should Take
- Confirm your current providers are in the TriWest network
- Update your contact preferences with TriWest
- Save new customer service numbers for TriWest
- Check that pending referrals and authorizations transferred properly
TriWest Contact Information
- Website: triwest.com
- Phone: 1-844-866-WEST (9378)
- Available 24/7 for urgent needs
Helpful Tips
- Call TriWest to confirm your providers are in-network before your next appointment
- Save TriWest customer service number (1-844-866-WEST) in your phone
- Check that any pending referrals transferred from Humana Military to TriWest
Related TRICARE Terms
Related Questions
How do I find a TRICARE provider?
Use the online provider directory on your regional contractor's website or call them directly for assistance.
When do I need a referral for TRICARE?
TRICARE Prime requires referrals for specialty care outside your PCM. TRICARE Select does not require referrals to see any authorized provider.
What are the TRICARE regions and contractors?
TRICARE has two US regions (East and West) plus overseas regions, each with a contracted health plan administrator managing the network.
What do most military families add to their TRICARE coverage?
Supplemental health insurance is the most common addition — it covers dental, vision, and out-of-pocket costs that TRICARE leaves uncovered. Life insurance and a legal will are also highly recommended.
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