Aetna uses different provider addresses for different stages. PO Box 981106, El Paso, TX 79998-1106 and PO Box 14079, Lexington, KY 40512-4079 are state-split commercial reconsideration addresses. A formal non-Medicare appeal goes to PO Box 14020, Lexington, KY 40512. PO Box 14079 also serves as Aetna's fallback for a provider-identified overpayment refund when no EOB or member ID card supplies an address. Medicare uses PO Box 14835 for contracted-provider appeals and PO Box 14067 for non-contracted-provider appeals or payment disputes. Always follow the address on the specific notice when it differs.
Why a PO Box Number Doesn't Tell You What It's For
Search "aetna po box 14079 lexington ky" or a fax number straight off a denial letter, and you're usually holding a piece of correspondence, not a directory. Aetna doesn't publish one page that lists every provider mailing address by purpose — the correct address depends on whether you're filing a reconsideration, a formal appeal, a Medicare Advantage dispute, or sending back an overpayment, and that address is normally printed on the document you already have.
That works fine when the document is in front of you. It doesn't work when a biller is triaging a stack of EOBs and needs to know, at a glance, what a given PO box actually handles before deciding whether to act on it or set it aside.
Aetna Mailing Address Directory at a Glance
| PO Box | Used For | Plan Type |
|---|---|---|
| PO Box 981106, El Paso, TX 79998-1106 | Reconsideration mail | Commercial / non-Medicare — Eastern and Central states |
| PO Box 14079, Lexington, KY 40512-4079 | Reconsideration mail; fallback for certain provider-identified overpayment refunds | Commercial / non-Medicare — Western states; refund fallback for all states |
| PO Box 14020, Lexington, KY 40512 | Formal appeal mail | Commercial / non-Medicare |
| PO Box 14835, Lexington, KY 40512 | Provider complaint and appeal mail | Medicare — contracted providers |
| PO Box 14067, Lexington, KY 40512 | Provider appeal or payment-dispute mail | Medicare — non-contracted providers |
Turn this denial into a review-ready draft.
Muni prepares a payer-specific appeal, policy citations, and an evidence checklist. Your team reviews and submits it.
Match your letter or EOB to this table first. If nothing on the document matches, the sections below explain each address in more detail, including the fax numbers and phone lines that pair with each one.
The Document in Your Hand Wins
If the denial letter, EOB, or overpayment request you're holding lists a different address than this directory, use the one on the document. Aetna's provider correspondence routing changes without much notice — this guide reflects Aetna's published 2026 disputes, appeals, and overpayment guidance, but a specific letter is always the more current source for that specific claim.
The Two Commercial Reconsideration Addresses
For commercial and non-Medicare reconsiderations, Aetna's Provider Resolution Team splits mail by state:
| Region | States | Mailing Address |
|---|---|---|
| Eastern and Central | CO, CT, DE, IL, IN, IA, KS, KY, ME, MD, MA, MI, MO, MT, NE, NH, NJ, NY, ND, OH, OK, PA, RI, SD, TX, VT, VA, DC, WV, WI, WY | Aetna Provider Resolution Team, PO Box 981106, El Paso, TX 79998-1106 |
| Western | AL, AK, AR, AZ, CA, FL, GA, HI, ID, LA, MS, NC, NM, NV, OR, SC, UT, TN, WA | Aetna Provider Resolution Team, PO Box 14079, Lexington, KY 40512-4079 |
These addresses come from Aetna's disputes and appeals guidance. The same page lists Aetna Provider Resolution Team, PO Box 14020, Lexington, KY 40512 for a formal non-Medicare appeal, with fax 1-859-455-8650. Our Aetna appeal form guide covers the reconsideration-versus-appeal decision and the forms each channel requires. Mail is Aetna's slowest and least trackable submission channel, so use it only when Availity genuinely isn't an option.
The Same Box, Two Jobs: What PO Box 14079 Actually Handles
PO Box 14079 in Lexington is the address that shows up most often in raw search traffic, and for good reason — it's not single-purpose. According to Aetna's own overpayment refund guidance, when a provider identifies an overpayment and doesn't have a specific EOB or member ID card to reference, the refund check goes to:
Aetna Inc.
PO Box 14079
Lexington, KY 40512-4079
That is the same box Western-state providers use for commercial reconsiderations. It is not the general formal-appeal address. For a provider-identified overpayment, follow the EOB or member ID card first and use PO Box 14079 only when neither supplies an address. If Aetna requested the refund, use the address on Aetna's request letter.
If Aetna Sent You a Refund Request
When Aetna identifies the overpayment and asks you to send it back, mail the refund to the address printed in that specific request letter rather than defaulting to PO Box 14079 — Aetna's guidance is explicit that the letter's address should be used when one is provided.
Medicare Advantage Uses Two Different Boxes Entirely
Medicare Advantage disputes don't route through the commercial Provider Resolution Team addresses at all, and they split by a different distinction than "which state" — whether you're a participating provider disputing Aetna's own decision, or a non-participating provider disputing the payment rate against what original Medicare would have paid.
| Situation | Mailing Address | Fax | Form Required |
|---|---|---|---|
| Contracted Medicare provider complaint/appeal | PO Box 14835, Lexington, KY 40512 | 1-860-900-7995 | Medicare Provider Complaint and Appeal Request |
| Non-contracted Medicare provider appeal or payment dispute | PO Box 14067, Lexington, KY 40512 | 1-724-741-4953 | Follow the notice and include the required supporting documentation |
Aetna's Medicare appeals page limits PO Box 14067 to non-contracted Medicare provider appeals or payment disputes. Aetna's current Medicare Provider Complaint and Appeal Request form lists PO Box 14835 and fax 1-860-900-7995 for contracted providers. Aetna's disputes overview pairs PO Box 14067 with fax 1-724-741-4953 for non-contracted providers.
For a Medicare appeal submitted by mail or fax, complete the Medicare Provider Complaint and Appeal Request form and include the supporting records the notice requests. Aetna's current disputes overview says a separate appeal form is not required when filing through Availity; follow the live portal prompts for the plan and dispute type. See our Aetna appeal form guide for the full channel comparison.
What Counts as a "Grievance" for a Provider
Providers searching for an "Aetna grievance address" are almost always looking for the same channel as a provider complaint — Aetna's own form is titled the "Practitioner and Provider Complaint and Appeal Request," and it routes to the same commercial or Medicare addresses above depending on plan type. A separately named member grievance process exists for enrollees disputing coverage or care decisions, and it uses different, member-facing contact information printed on the member's plan materials — not a provider correspondence address. If your practice is filing on its own behalf about a payment, coding, or clinical decision, use the complaint-and-appeal addresses in this guide rather than searching for a distinct grievance mailbox.
When to Skip the Mail Entirely
| Channel | Speed | Confirmation | Best For |
|---|---|---|---|
| Availity portal | Fastest | Immediate case number | Nearly everything — commercial reconsiderations, appeals, and status checks |
| Fax | Same day | Fax transmission log only | When Availity access is genuinely unavailable |
| Slowest — days to arrive | None, unless sent certified with return receipt | Bulky records or a state-mandated written submission | |
| InstaMed | Same day | Electronic payment confirmation | Overpayment refunds, instead of mailing a check |
Aetna's own disputes and appeals overview points providers to Availity first, and for good reason — a mailed reconsideration or appeal has no tracking number until Aetna processes it, which can take days you don't have if you're close to the 180-day reconsideration or 60-day appeal deadline. Reserve mail for the file sizes or state requirements that genuinely need it.
Before You Mail Anything
Common Mistake
Sending a check or appeal packet to whichever PO box shows up first in a search, without checking whether it matches the workflow and plan type on the notice. A mismatched address can delay processing while the filing clock continues to run.
Have this ready before you seal the envelope:
- The plan type — commercial, Medicare Advantage, or Medicare Supplement — confirmed from the member ID card, not assumed
- The correct form — the commercial Complaint and Appeal Request, or the Medicare version, matched to the plan type above
- Tax ID Number (TIN) and NPI for the billing provider
- The original denial letter, EOB, or overpayment request letter, since its printed address overrides this directory for that specific item
How Muni Appeals Keeps Addresses From Becoming the Bottleneck
Confirming the right Aetna mailing address, attaching the correct form, and tracking whether a mailed appeal ever arrived is exactly the kind of manual step that eats staff time without needing a person's judgment. Muni Appeals organizes the documentation for each Aetna dispute and surfaces the likely submission channel for staff to verify before it goes out.
Frequently Asked Questions
What is Aetna's claims mailing address?
It depends on the workflow and plan. Commercial reconsiderations use PO Box 981106 (Eastern/Central states) or PO Box 14079 (Western states). Formal non-Medicare appeals use PO Box 14020. Contracted Medicare provider appeals use PO Box 14835; non-contracted Medicare provider appeals use PO Box 14067. Follow the notice when it supplies a different address.
What is Aetna PO Box 14079 in Lexington, KY used for?
It is the Western-state Provider Resolution Team address for commercial reconsiderations. It is also Aetna's fallback for a provider-identified overpayment refund when neither the EOB nor member ID card supplies an address. Aetna-requested refunds go to the address on the request letter.
What is Aetna's appeals mailing address?
Formal non-Medicare appeals use PO Box 14020. Contracted Medicare providers use PO Box 14835, while non-contracted Medicare providers use PO Box 14067. The state-split PO Boxes 981106 and 14079 are for commercial reconsiderations, not formal appeals.
Where do I mail an Aetna claim attachment or correspondence?
Attach supporting documents to the claim through Availity rather than mailing them separately — a standalone mailed attachment risks arriving without being matched to the original claim. If a specific address for supplemental correspondence is printed on the EOB or a request letter, use that address instead.
Is there a separate address for Aetna Medicaid (Aetna Better Health) appeals?
Yes. Aetna Better Health mailing addresses are state- and program-specific rather than a single national address. Use the contact page for the applicable state program on AetnaBetterHealth.com or the address printed on the member's Medicaid ID card.
Should I mail my appeal, or use the Availity portal?
Use Availity when possible — it generates an immediate case number and avoids the multi-day mail transit time that eats into your filing window. Reserve mail for cases with bulky supporting records or a state requirement for written submission.
What if the address on my letter doesn't match this directory?
Use the address on the letter or EOB. The specific document you received controls for that claim and may reflect plan-, state-, or contract-specific routing that a general directory cannot capture.
This directory reflects Aetna's provider mailing addresses as published on Aetna's disputes and appeals, Medicare appeals, and overpayment refund pages as of September 2026. Addresses, fax numbers, and routing change without much notice and can vary by state, plan, and contract — verify against the specific denial letter, EOB, or overpayment request before mailing. This information is for administrative and billing purposes and is not legal or medical advice.