Humana Fax Number: Claims, Appeals & Prior Auth

By Alexey Spasskiy · Published November 4, 2026 · 10 min read

Quick Answer: There is no single Humana fax number. Humana's forms print a different line for each job: 855-227-0677 for medical prior authorization, 877-486-2621 for Part D drug requests, 888-447-3430 for drugs given in the office, 888-556-2128 for member appeals and grievances, and 866-305-6655 for medical records Humana asked for. A practice that faxes Humana every week can send from its own number, with a signed BAA, on mFax Business.

Searching for a Humana fax number turns up a dozen numbers, and most of them are right for something. The trouble is that each belongs to one department: a Part D appeal faxed to the medical prior authorization line, or a claim dispute faxed anywhere, waits in the wrong queue.

Humana is also a different insurer than it was a few years ago. Its 2025 annual report (Form 10-K) says Humana "finalized our exit from the Employer Group Commercial Medical Products business" during 2025: fully insured, self-funded and Federal Employee Health Benefit medical plans. What remains is mostly Medicare Advantage, Medicare Part D, state Medicaid contracts and TRICARE administration, so the numbers below are the Medicare-era ones.

Every number here comes from a Humana form or PDF, linked in its row, and was checked on 2026-11-13.

Humana Fax Numbers at a Glance

The right Humana fax number depends on what you are sending and who is sending it. Find your row, then read its section for the conditions that come with it.

Humana Prior Authorization Fax Number

For medical services, Humana's prior authorization fax is 855-227-0677, with behavioral health requests at 469-913-6941, according to the 2026 Provider Manual. Fax is not Humana's first choice, though. The manual calls Availity "the preferred method submission for faster processing", and the Medicare Advantage prior authorization list, revised November 2, 2026, names only two ways to start a medical request:

• Online on Availity Essentials (registration required). For some services, a questionnaire can lead to a real-time approval.
• By phone, through Humana's interactive voice response line at 800-523-0023. The manual sends expedited requests to the same number.

If you do fax, send everything at once. Humana's manual lists what a request may need:

• The member's Humana ID number, name and date of birth
• Date of service or admission, type and place of service
• Procedure codes (up to 10 per request) and diagnosis codes (up to 6)
• TIN and NPI of the requesting provider, the treating facility and the performing provider
• The attending physician's phone number, relevant clinical information and discharge plans

Since January 1, 2026, CMS requires decisions within 7 days for certain medical requests, Humana's list notes, and missing clinical information "may result in a delayed or adverse decision."

Services Humana routes to a vendor

Some services on the Medicare Advantage list are reviewed by another company, not by Humana. Cohere Health handles certain cardiac devices and advanced imaging, with fax 857-557-6787 next to its portal and phone line, and Evolent (formerly New Century Health) handles others, such as some cancer ablation procedures. Check the service's row on the prior authorization list before you fax: a request sent to Humana for a vendor-managed code goes to the wrong reviewer.

Advance coverage determinations

An ACD asks Humana, before the service, whether a Medicare Advantage plan will pay for it. Humana uses it in place of the Advance Beneficiary Notice, which CMS does not allow for Medicare Advantage members. The list gives fax 800-266-3022 for medical services and 888-447-3430 for medications on the list; private fee-for-service plans use 502-508-3551, per the manual. By mail, ACDs go to Humana Correspondence, P.O. Box 14601, Lexington, KY 40512-4601.

Humana Pharmacy and Part D Fax Numbers

Drug requests split by how the drug is billed. Humana's prescriber quick reference guide puts them side by side:

Humana's online route for Part D requests is CoverMyMeds. A Part D coverage determination can come from the prescriber or the member; anyone else must be the member's appointed representative, the coverage determination form says. By mail it goes to Humana Clinical Pharmacy Review, P.O. Box 14601, Lexington, KY 40512.

CenterWell Pharmacy is not where prior authorizations go

CenterWell is Humana's own mail-delivery pharmacy, and the prescriber guide lists a fax line for providers at each of its two pharmacies. Those lines belong to the pharmacy, not to the team that decides coverage:

• CenterWell Pharmacy (maintenance drugs and medical equipment): fax 800-379-7617, phone 800-967-9830
• CenterWell Specialty Pharmacy: fax 877-405-7940, phone 800-486-2668

A "CenterWell prior authorization" still goes to Humana Clinical Pharmacy Review at 877-486-2621. For the prescription itself, our guide to faxing a prescription covers what a pharmacy needs on the page. A member with Part D through a CVS-run plan uses other lines, listed in our CVS Caremark fax number guide.

Humana Appeal Fax Numbers

Humana's appeal fax depends on whether the denial is for a medical service or a drug, and on who files the appeal.

Medical appeals and grievances for members

Humana's Appeal or Grievance Form goes to the Humana Grievance and Appeals Department, P.O. Box 14165, Lexington, KY 40512-4165, or by fax to 888-556-2128. It takes both complaints and appeals, for medical services and medications. The form asks for:

• The member's name, Humana ID number and date of birth
• The service or medication, the provider, the service date and the claim number if there is one
• What happened, with copies of receipts, bills, medical records or a letter from the doctor

A box on the form asks for an expedited decision within 72 hours. Humana accepts it only for care not yet received and needs a statement from the provider explaining why waiting could seriously harm the member. Someone filing for the member completes the form's representative section; a provider or legal representative also needs a separate Appointment of Representative form.

Part D drug appeals (redeterminations)

The member's Request for Redetermination of Medicare Prescription Drug Denial prints fax 1-877-556-7005 and P.O. Box 14165, Lexington, KY 40512-4165, with 1-800-595-0462 and a San Juan address for Puerto Rico. The same form takes expedited requests by phone at 1-800-867-6601, and a prescriber's statement that waiting 7 days could seriously harm the member gets an automatic 72-hour decision.

Deadlines and decision times

Humana's 2026 Provider Manual gives 65 calendar days from the date of the denial notice to appeal, unless the member can show good cause. Your notice states the deadline that applies to your case. Decisions come within these limits:

Ending care is a different process. A member who gets a Notice of Medicare Non-Coverage for skilled nursing, home health or rehab care asks the Quality Improvement Organization named on the notice for a fast-track review, not Humana's appeal fax. For more on Original Medicare's own lines, see our Medicare fax number guide.

For providers: claim disputes and appeals

Humana's manual calls a disagreement with a paid or denied claim a dispute, and it lists no fax line for it. Providers file one of three ways:

• Online on Availity Essentials: find the claim with Claim Status, choose Dispute Claim, then add records in the Appeals worklist.
• By phone at the number on the member's ID card or 800-448-6262.
• By mail to the address on the ID card, or Humana Correspondence, P.O. Box 14601, Lexington, KY 40512.

A written dispute names the provider, NPI and TIN, the member and ID, the date of service, the claim number, the amount paid, the amount you expected and the reason. Humana must receive it within 18 months of the original claim decision unless law or your contract sets another limit.

Non-participating providers appeal Medicare claims through Availity or by mail to Humana Grievances and Appeals, P.O. Box 14165, Lexington, KY 40512-4165. Humana's claim-payment inquiry resolution guide gives fax 800-949-2961 for expedited Medicare appeals and 855-336-6220 for expedited Medicaid and dual-plan appeals. Every Medicare appeal from a non-participating provider needs a signed Waiver of Liability form that holds the member harmless.

Is There a Humana Claims Fax Number?

No, not for filing claims. Humana's manual requires providers to submit claims electronically, in the HIPAA 837 format or through a clearinghouse, unless the law allows paper; paper claims go to the address that Humana's prescriber guide says "is located on the patient's Humana member ID card".

Two kinds of claim paperwork do go by fax:

• Medical records Humana requested. Send them through Medical Records Management on Availity, through your EMR vendor, by fax to 866-305-6655, or by mail to Humana Medical Records Management, P.O. Box 14465, Lexington, KY 40512. Include a copy of the request letter and only the dates it asks for.
• Disputes of a record review finding. Humana's Provider Payment Integrity team takes its dispute request form by fax at 888-815-8912 or by mail to P.O. Box 14279, Lexington, KY 40512-4279, unless your findings letter gives another address.

Comparing Humana with another Medicare Advantage carrier? Our Aetna fax number guide lays out the same lines for Aetna.

How to Fax Documents to Humana

A fax to Humana lands where it should when you pick the line from the table, put Humana's identifiers on the cover sheet and keep proof the pages arrived. Here's the sequence in mFax, on the web or in the iPhone, Android and Windows apps:

A delivered fax proves the transmission, not that a reviewer has read it. If nothing comes back, call the number on the member's ID card with the receipt and page count in hand.

Faxing PHI to Humana: What HIPAA Requires

HIPAA lets a practice fax patient records to a health plan; what the practice adds is a business associate agreement with the service that carries the fax. HIPAA applies to health plans, clearinghouses, providers that bill electronically and their business associates, as HHS's page on covered entities and business associates lays out. Humana's own manual asks providers to limit disclosures to "the minimum necessary" and not to fax records to a local Humana market office unless confidentiality is assured.

mFax Business covers that part:

• A BAA on every plan, at no extra cost. The workspace owner opens Settings, chooses Review & sign on the Business Associate Agreement row, both sides sign electronically, and the row shows Signed with the date.
• What a privacy officer asks about: PHI stored and processed in the US, a confirmed-or-failed status on every fax, and every teammate signing in with their own login.
• A fax number to put on Humana's forms. Humana's drug request forms ask for the prescriber's office fax. Your practice's fax line drops whatever comes in into a shared Received list.
• Fax from email, too. Staff can address a message to the fax number at send.mfax.to (the medical prior authorization line becomes 18552270677@send.mfax.to) and attach the PDF; the address they sign in with is already authorized. The subject and body become the cover sheet, so keep patient details in the attachment.

Plans start from about $9/mo, and you build your own from the seats and pages you need. For the wider rules, read our HIPAA-compliant fax guide and how to fax PHI securely.

Faxing your own appeal as a member? HIPAA's rules bind plans, providers and their business associates, not you sending your own records. Open the mFax app, upload Humana's form and send it in under 2 minutes, free for 7 days. On iPhone or Android, the app's scanner turns a paper denial letter into a fax-ready PDF.

When a Fax to Humana Doesn't Go Through

When a fax to Humana fails, its status names the reason. As mFax's support notes, most failures happen on the receiving side, and a second attempt goes through:

• Recipient busy, No answer — the line was in use or didn't pick up. Busy lines are retried automatically; otherwise wait a few minutes and press Resend.
• No fax tone, Declined — the number answered, but no fax machine did. You most likely dialed a phone line such as 800-523-0023 or 800-555-2546; check the number against the table.
• Invalid number, Number not in service — re-check the digits and the +1.
• File too large — the packet is over 60 pages or 100 MB. Split it into two faxes and mark each cover sheet "1 of 2" and "2 of 2".

Fax Humana from Your Practice's Own Number

mFax Business gives your practice a fax number for Humana's replies, HIPAA-compliant faxing with a signed BAA, and a delivery receipt for every packet, on web, mobile and desktop. Build your own plan from about $9/mo, and cancel anytime.