The Humana fax number you need depends on the request. Medicare Part D coverage determinations (Humana's drug prior authorizations and exceptions) go to Humana Clinical Pharmacy Review at 1-877-486-2621. Humana Group Medicare members fax expedited appeals and grievances to 800-949-2961. Prescribers send CenterWell Pharmacy mail delivery prescriptions to 800-379-7617 and CenterWell Specialty Pharmacy forms to 877-405-7940. If your denial letter or Evidence of Coverage gives another number, use that one.

This guide lists each number we verified on Humana and CenterWell sites, with the plan type each source names, and explains how to avoid the most common faxing mistakes.

  • Verified numbers for Part D, Medicare expedited appeals, provider appeals, and CenterWell
  • Plan type matters: Medicare, commercial, and Medicaid appeals use different lines
  • Some lines are expedited only, which catches many people out

Table of Contents

What Humana accepts by fax

Humana is mainly a Medicare insurer, with Medicare Advantage, Part D drug plans, group Medicare plans for employers, and Medicaid plans in some states. CenterWell Pharmacy is Humana's own pharmacy, formerly Humana Pharmacy. Fax is common for:

  • Part D coverage determinations, which cover prior authorization, step therapy, and formulary or tier exceptions for drugs
  • Appeals and grievances from members
  • Claim appeals from healthcare providers
  • New prescriptions for CenterWell Pharmacy mail delivery and CenterWell Specialty Pharmacy

Verified Humana fax numbers

Verified November 2026:

Plan type What to fax Fax number Source
Humana Medicare Part D Request for Medicare Prescription Drug Coverage Determination (phone 1-800-555-2546) 1-877-486-2621 Coverage determination form (PDF)
Humana Group Medicare Expedited Part D coverage determinations 1-877-486-2621 2026 Group Medicare EOC (PDF)
Humana Group Medicare Expedited appeals (medical care or Part D drugs), expedited grievances, expedited medical coverage decisions 800-949-2961 2026 Group Medicare EOC (PDF)
Medicare (nonparticipating providers) Expedited claim appeals, with a signed Waiver of Liability 800-949-2961 Claim-payment inquiry guide (PDF)
Medicaid and dual Medicare-Medicaid (providers) Expedited claim appeals 855-336-6220 Claim-payment inquiry guide (PDF)
Commercial (providers) Standard claim appeals 888-556-2128 Claim-payment inquiry guide (PDF)
Commercial (providers) Expedited claim appeals 920-339-2112 Claim-payment inquiry guide (PDF)
CenterWell Pharmacy (mail delivery) Provider Fax Form, from the provider's office (phone 800-967-9830) 800-379-7617 CenterWell prescriber information, Provider Fax Form (PDF)
CenterWell Specialty Pharmacy Specialty prescription forms (phone 800-486-2668) 877-405-7940 CenterWell prescriber information, Specialty forms

Notes on the numbers:

  • "Expedited only" means it. The 2026 Group Medicare Evidence of Coverage lists 800-949-2961 for expedited requests only. Standard appeals for that plan go by mail to the Humana Grievance and Appeal Dept., P.O. Box 14165, Lexington, KY 40512-4165, unless your plan documents say otherwise. Expedited appeals can also be made by phone at 1-800-867-6601.
  • Group vs individual plans. The Evidence of Coverage we checked is for a Humana Group Medicare Advantage HMO plan. Individual Medicare Advantage and Part D plans have their own Evidence of Coverage, which may list different lines.
  • Provider appeals. Humana's guide asks providers to submit appeals through Availity Essentials where possible. Fax numbers in the table are the alternatives it lists.
  • CenterWell timing. The Provider Fax Form says a faxed prescription can take up to 48 hours to be entered after it arrives.

Your letter or Evidence of Coverage wins

Humana prints contact details in two places that beat any list, including this one:

  • Your denial letter or notice, which names the unit, fax number, and deadline for your case.
  • Your plan's Evidence of Coverage, Chapter 2, which lists phone, fax, and mailing details for coverage decisions, appeals, and complaints for your specific plan.

If you have either, use the number it gives. A standard appeal faxed to an expedited-only line, or a commercial appeal sent to a Medicare unit, lands in the wrong queue while your deadline keeps running.

How to fax Humana, step by step

  1. Identify the plan type and the request: Part D drug, medical appeal, provider claim appeal, or a prescription.
  2. Check your letter or Evidence of Coverage for the fax number.
  3. Use the matching form. The coverage determination form for Part D, the Provider Fax Form for CenterWell mail delivery, or the form your denial letter names.
  4. Add the member ID to every page and attach the prescriber's supporting statement or medical records. A family member or friend filing for you must be your appointed representative, for example with Form CMS-1696.
  5. Flag urgent requests as expedited. Ask for a fast review if waiting could seriously harm your health.
  6. Keep the confirmation and a copy of every page.

If you do not have a fax machine, you can send a fax online for $2.99 with no subscription and no account. That works for member appeals and provider paperwork. CenterWell prescriptions still have to be sent by the prescriber's office.

Why Humana faxes get delayed

  • Standard requests on expedited lines. Several Humana fax numbers are for expedited requests only.
  • Wrong plan type. Medicare, Medicaid, and commercial appeals use different units.
  • No representative form. A request from someone other than the member or prescriber needs proof of representation.
  • Missing member ID on loose pages.
  • Schedule II on the CenterWell form. The Provider Fax Form is not valid for CII medications.
  • Prescriptions sent by patients. CenterWell accepts prescription faxes only from providers.

Faxing Humana comes down to the right number for your plan and request, a complete form with supporting documents, and a confirmation you keep.

Fax your Humana documents now →

Frequently asked questions

What is the Humana Medicare Part D prior authorization fax number?

Humana's Request for Medicare Prescription Drug Coverage Determination form tells you to fax it to Humana Clinical Pharmacy Review at 1-877-486-2621. You can also request a coverage determination by phone at 1-800-555-2546.

What is the Humana Medicare appeals fax number?

Humana's 2026 Group Medicare Evidence of Coverage lists 800-949-2961 for expedited appeals of medical care or Part D drugs, and 1-800-867-6601 for expedited appeals by phone. Standard appeal routes vary by plan, so check your own Evidence of Coverage or denial letter.

What is the CenterWell Pharmacy fax number for prescriptions?

Prescribers fax the CenterWell Pharmacy Provider Fax Form to 800-379-7617 for mail delivery. CenterWell Specialty Pharmacy takes forms at 877-405-7940. Both are for prescribers, and the mail delivery form is not valid for Schedule II drugs.

What fax number do providers use for Humana claim appeals?

Humana's claim-payment inquiry guide lists 888-556-2128 for commercial standard appeals and 920-339-2112 for commercial expedited appeals. Nonparticipating providers can fax Medicare expedited appeals to 800-949-2961, with a signed Waiver of Liability.

Can I fax my own prescription to CenterWell Pharmacy?

No. The CenterWell Provider Fax Form must be completed, signed, and faxed from the provider's office, and CenterWell Specialty Pharmacy accepts faxes only from prescribers. Ask your doctor to e-prescribe or fax it.

Sources