BCBS Texas: Fax Number for Predetermination Requests

BCBS Texas's confirmed fax number is for predetermination requests only, not standard claims, appeals, or prior authorization.

Sarah Mitchell

Published on

September 17, 2026

Last updated on

September 22, 2026

BCBS Texas's confirmed predetermination fax, 888-579-7935, is explicitly not for claims payment, appeals, or standard prior authorization.
Federal Employee Program members use a separate fax, 888-368-3406, for the same predetermination process.
Standard claims and prior authorization route through the Availity portal or phone instead.

Who This Page Is For

Providers requesting a predetermination, an advance review of whether a service will be covered, from Blue Cross Blue Shield of Texas. If you need to submit a standard claim or prior authorization, this isn't the right number, BCBS Texas routes those through Availity or phone.

What is BCBS Texas's fax number for predetermination?

BCBS Texas's own Predetermination Request Form confirms a fax of 888-579-7935 for general use, and 888-368-3406 specifically for Federal Employee Program members. The form itself states plainly that it is not for claims payment, appeals, or standard prior authorization, all of which BCBS Texas routes through its Availity portal or phone instead.

Where to fax

Predetermination request (Provider, General): fax 888-579-7935. Source: BCBS Texas Predetermination Form.
Predetermination request (Provider, Federal Employee Program): fax 888-368-3406. Source: BCBS Texas Predetermination Form.
Standard claims, appeals, or prior authorization (Provider, Any): Not by fax, use the Availity portal or phone. Source: BCBS Texas Provider Authorization.

Fax number(s) verified 2026-09-17.

Which route should I use?

Use this fax only for a genuine predetermination, an advance check on coverage before a service happens, not for an already-provided service.
Confirm whether the member has Federal Employee Program coverage, which uses a separate fax number.
For claims, appeals, or standard prior authorization, don't use fax at all, BCBS Texas routes those through Availity.

Documents to include

Use BCBS Texas's own Predetermination Request Form, it specifies the exact clinical and coding information the reviewer needs.

Several other health and life insurers follow a similar pattern. Our directory also covers EyeMed's fax numbers, how to fax GEHA, the Guardian fax page, Health Net's claims fax, sending a fax to Meritain Health, and Transamerica's fax number, each with its own destination and audience notes.

Fax.Plus encrypts stored predetermination faxes with 256-bit AES and unique per-user keys, relevant for the clinical detail this form requires.

FAQs

Can I use the BCBS Texas predetermination fax for a claim appeal?

No. BCBS Texas's own predetermination form states explicitly that the fax is not for claims payment, appeals, or standard prior authorization. Those route through Availity or phone instead.