Medicare Part D reconsideration fax number

C2C, the Medicare Part D independent review entity, prints two reconsideration fax numbers: 833-710-0580 for standard appeals and 833-710-0579 for expedited appeals. C2C's Prescribers page labels both lines "Fax for Enrollees Only".

What is the Medicare Part D reconsideration fax number?

The Medicare Part D reconsideration fax number is 833-710-0580 for standard appeals and 833-710-0579 for expedited appeals.

C2C is the Medicare Part D independent review entity, and both fax numbers are toll-free.

What should I send with a fax to C2C?

A fax to C2C carries the Request for Reconsideration of Medicare Prescription Drug Denial form that the Part D plan sends with its redetermination letter. The General Appeal Instructions for prescribers and pharmacists also say to submit one reconsideration request and one case file per submission, and to identify the prescriber's first and last name, mailing address, and telephone and fax numbers. A cover sheet for the request can add the sender's name, a return phone number, the page count, and the date.

Can I submit to C2C online instead of by fax?

Yes, the QIC Appeals Portal is the online route that C2C names as a submission method for prescribers and pharmacists. Do not fax a request already submitted through the QIC Appeals Portal.

Who may use the Medicare Part D reconsideration fax line?

The Medicare Part D reconsideration fax lines, 833-710-0580 and 833-710-0579, are for enrollees: C2C's Prescribers page labels both "Fax for Enrollees Only". For prescribers and pharmacists, C2C names the QIC Appeals Portal as a submission method. A prescriber can file a reconsideration request for the enrollee without being an appointed representative.

For a Medicare claim rather than a reconsideration, see whether you can fax a Medicare claim.

How long do I have to request an independent review?

An independent review may be requested within 65 days of the date of the plan's Redetermination Notice.

How fast does a Part D reconsideration decision come?

A standard Medicare Part D reconsideration decision comes within 7 days, and an expedited decision comes within 72 hours. An expedited decision is automatic when the prescriber says waiting 7 days could seriously harm the enrollee's life, health or ability to regain maximum function.

How do I send a fax from a HIPAA fax account?

Fax Pigeon sends a fax from the browser or from email. A PDF, a Word, Excel or PowerPoint file, or a phone photo uploads as it is. A cover sheet is optional, and every delivered fax gets delivery proof.

What if the fax fails or the number changes?

The Request for Reconsideration form and the Prescribers page named in the footer list the verified fax numbers. If a fax fails or a number changes, confirm the current number on those pages before you resend.

For the steps to tell whether a fax went through, see how to tell if a fax went through.

* Fax numbers verified October 13, 2026, on C2C's own Request for Reconsideration of Medicare Prescription Drug Denial form (PDF) (https://partdappeals.c2cinc.com/Portals/0/Documents/Forms/Prescription-Drug-Reconsideration-Request-Form-508.pdf) and Prescribers page (https://partdappeals.c2cinc.com/Prescribers).