Medicare Part D appeal fax numbers (independent review)

Level 2: independent review entity (C2C Innovative Solutions)

• Drug coverage reconsideration, standard (enrollees) 833-710-0580 Fax this number
• Drug coverage reconsideration, expedited (enrollees) 833-710-0579 Fax this number
• Late enrollment penalty reconsideration (enrollees) 833-946-1912 Fax this number

How to fax it

1. Level 1: fax your plan at the number in its denial notice or on its coverage determination form.
2. Level 2: fill in the Request for Reconsideration form (or write a request), and include the plan’s redetermination notice and all your documents in one fax.
3. Add your prescriber’s statement if you’re asking for an exception.
4. Send it from dimefax.com/send.
5. Keep the delivered confirmation. Dimefax shows the date and time it went through.

Tips

• CMS rebids the review contract from time to time, so check the reviewer named in your plan’s notice.

Dimefax costs 10¢ a page and you’re only charged if the fax goes through. On the web, page credits come in packs of 50 for $4.99, 100 for $9.99 or 200 for $19.99; the Dimefax iPhone app also sells 10 for $0.99. Credits you don’t use stay in your account and last as long as you fax once a year.

Where these numbers come from

• C2C Innovative Solutions: Part D appeal instructions
• Medicare.gov: Appeals in drug plans

Dimefax isn’t part of, or endorsed by, Medicare or its Part D review contractor. We copied these numbers from partdappeals.c2cinc.com on November 11, 2026. Agencies change their numbers: if your letter, notice or form gives a different one, use that.