Prime Therapeutics: Fax Numbers for Prior Authorization

Prime Therapeutics still accepts fax for prior authorization, with numbers that vary by health plan. ePA is offered alongside, not a replacement.

Sarah Mitchell

Published on

September 17, 2026

Last updated on

September 22, 2026

Prime Therapeutics confirms fax is still accepted for prior authorization, with no phase-out language on its official site.
Fax numbers vary by health plan, for example 1-800-424-3260 for Choice/commercial plans and 1-800-424-7912 for MRX/house account plans.
Electronic prior authorization through CoverMyMeds is offered as an option alongside fax, not a requirement.

Who This Page Is For

Providers submitting prior authorization requests on behalf of a member covered by a Prime Therapeutics-administered plan, often a Blue Cross Blue Shield plan. Check which specific plan applies before choosing a fax number.

Is fax still accepted at Prime Therapeutics?

Prime Therapeutics continues to accept fax for prior authorization requests, confirmed directly on its provider prior authorization hub. Unlike some peers in this cluster, Prime Therapeutics does not frame fax as being phased out, it presents electronic prior authorization (ePA) through CoverMyMeds as an available option, not a mandated replacement. Fax numbers vary by the specific health plan: Choice/commercial plans fax to 1-800-424-3260, while MRX/house account plans use 1-800-424-7912.

Where to fax, by plan

Prior authorization (provider, Choice/commercial plans): fax 1-800-424-3260. Source: Prime Therapeutics' own Provider Prior Auth hub.
Prior authorization (provider, MRX/house account plans): fax 1-800-424-7912. Source: Prime Therapeutics' own Provider Prior Auth hub.
Prior authorization (provider, any other Prime-administered plan): check the plan-specific fax form on Prime's provider hub. Source: Prime Therapeutics' own Electronic Prior Authorization page.

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

What replaced fax at Prime Therapeutics?

Nothing has replaced fax outright. Prime Therapeutics promotes ePA via CoverMyMeds as a faster alternative, but its own materials treat fax and ePA as coexisting options rather than framing one as a legacy channel being retired.

Which route should I use?

Identify the exact health plan on the member's ID card, Prime Therapeutics' fax numbers are plan-specific, not universal.
Use the plan-specific fax form from Prime's provider hub rather than a generic Prime Therapeutics number found elsewhere.
Consider CoverMyMeds ePA if speed matters, it's a genuine option here, not required.

Several other pharmacy prior authorization intermediaries follow a similar pattern. Our directory also covers Carelon's fax number, is fax still accepted at Evolent, the Cohere Health fax page, and Express Scripts's prior authorization fax, each with its own fax status and routing notes.

Fax.Plus stores Prime Therapeutics prior authorization faxes with 256-bit AES encryption at rest, unique key per user.

FAQs

Does Prime Therapeutics have one fax number for all plans?

No. Fax numbers vary by health plan, for example 1-800-424-3260 for Choice/commercial plans and 1-800-424-7912 for MRX/house account plans. Check the specific plan's form.