TRICARE claims and appeals
TRICARE / West Region Authorization Appeals
Appeal a TRICARE West authorization denial
Use the number only for the documented purpose and routing rule below.
This listing does not guarantee delivery, processing, acceptance, or deadline treatment. Recheck the official instructions before sending.
Route decision
Is this the right fax route?
Match all three checks before using the number.
- 01 Purpose
- Appeal a TRICARE West authorization denial
- 02 Region or eligibility
- TRICARE West Region beneficiaries or their appointed representatives appealing a denied referral or pre-authorization.
- 03 Required form or document
- Completed Authorization Appeals Form, written reason for the appeal, denial letter, supporting records, and a signed Appointment of Representative form when applicable.
Submission notes
What to put on the route.
Routing instructions
Fax the appeal package to the TriWest Appeals and Reconsideration Department. Include the beneficiary and sponsor identifiers listed in the official instructions.
Official source and check date
Recheck the route before sending.
- Recipient
- TRICARE
- Fax
- 866-852-1919
- Last checked
As of August 25, 2026, the linked TRICARE source listed this number for the purpose shown. Just One Fax is not affiliated with or endorsed by TRICARE.
Before transmission
Questions to answer before sending.
What is the TRICARE fax number for this purpose?
866-852-1919 is the fax number published in the cited official source for this specific purpose: Appeal a TRICARE West authorization denial. Recheck the source immediately before sending.
How do I know whether this is the right regional route?
TRICARE West Region beneficiaries or their appointed representatives appealing a denied referral or pre-authorization.
What should I send to this fax number?
Completed Authorization Appeals Form, written reason for the appeal, denial letter, supporting records, and a signed Appointment of Representative form when applicable. Fax the appeal package to the TriWest Appeals and Reconsideration Department. Include the beneficiary and sponsor identifiers listed in the official instructions.
Does this listing guarantee acceptance?
No. The linked source listed this route on August 25, 2026, but only the recipient can determine delivery, eligibility, processing, acceptance, or deadline treatment.
Number prefilled, decision still yours
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Open the send flow with 866-852-1919 prefilled. Compare it with the official source again before checkout.
Send to 866-852-1919