Medicare Appeals, ABNs, and Fast Appeals: How to Fight a Denial
A warning that Medicare may not pay, a denied claim, and a discharge you think is too early are three separate situations. Each has its own notice, deadline and reviewer.
Medicare gives you three separate protections. An ABN (Advance Beneficiary Notice) is a written warning a provider must give you before a service when they think Original Medicare may not pay. A standard appeal is what you file after a claim is denied. It has up to five levels and can take months. A fast (expedited) appeal is for when you are being discharged from a hospital, or your skilled nursing, home health or hospice care is about to end. An independent reviewer decides within about one to three days.
Most people meet this system once, at a bad moment: a claim is denied, or a hospital says it is time to go home. The notice in your hand tells you which process you are in and the deadline. The deadlines for fast appeals are measured in hours.
| Your situation | Notice you get | Your deadline | Who decides |
|---|---|---|---|
| Provider thinks Medicare won't pay for a service | ABN | Decide before the service | You |
| Original Medicare denied a claim | Medicare Summary Notice | 120 days | Medicare contractor (MAC) |
| Medicare Advantage plan denied a request | Notice of Denial of Medical Coverage or Payment | 65 days | The plan, then an independent reviewer |
| Hospital discharge you think is too early | Important Message from Medicare | Midnight of the discharge day | BFCC-QIO |
| Skilled nursing, home health or hospice care ending | Notice of Medicare Non-Coverage | Noon the day before services end | BFCC-QIO |
The ABN: being warned before you're billed
An Advance Beneficiary Notice of Noncoverage applies to Original Medicare Part B. A provider must give it to you in writing before an item or service when they believe Medicare may deny it. Common reasons are that the provider does not expect Medicare to consider it medically necessary, that it goes over a frequency limit, or that it is experimental.
The notice has to reach you early enough for you to make a decision. You then choose one of two things: get the item or service and accept that you may have to pay if Medicare denies the claim, or go without it.
If a provider was required to give you a valid ABN and did not, and Medicare denies the claim, the provider generally cannot bill you. The provider bears the cost.
The ABN form is not used in Medicare Advantage. Those plans send their own written denial, covered below.
Standard appeals: the five levels for a denied claim
After Original Medicare denies a claim, you can appeal through five levels. Each has its own deadline.
- Redetermination. Decided by the Medicare Administrative Contractor (MAC) that processed the claim. You generally have 120 days from the date on your Medicare Summary Notice.
- Reconsideration. A new review by a Qualified Independent Contractor (QIC), which is separate from the MAC. You generally have 180 days from the redetermination decision.
- ALJ hearing. A hearing before an Administrative Law Judge at the Office of Medicare Hearings and Appeals (OMHA). You generally have 60 days to request it. For 2026, at least $200 must be in dispute.
- Medicare Appeals Council review. Generally within 60 days of the ALJ decision.
- Federal district court. Generally within 60 days of the Council's decision. For 2026, at least $1,960 must be in dispute.
Each level reviews the case again. The process is slow, and it is meant for care you have already received.
For the first level, circle the denied item on your Medicare Summary Notice, write why you disagree, sign it and send it to the address on the notice. Ask your doctor for a short letter explaining why the service was medically necessary, and include it. Keep copies of everything.
ABN
A before-the-fact warning from your provider that Medicare might not pay. Applies to Original Medicare Part B only.
Standard Appeal
After-the-fact process for a denied claim. Five levels, with deadlines of 120, 180, 60, 60 and 60 days.
Fast Appeal
For care that is ending: a hospital discharge, or the end of SNF, home health or hospice care. Decided in roughly 24 to 72 hours.
MA Organization Determination
A Medicare Advantage plan's own initial decision. 14 days standard, 72 hours if expedited, before any appeal starts.
Medicare Advantage: shorter deadlines and an automatic outside review
In Medicare Advantage, the plan first makes an organization determination. It generally has 14 days for a standard request and 72 hours for an expedited one. For Part B drugs, it has 72 hours, or 24 hours if expedited.
If the plan says no, it must send you a written Notice of Denial of Medical Coverage or Payment, also called the Integrated Denial Notice. The notice gives the reason and explains how to appeal.
You then have 65 days to ask for a plan reconsideration. The plan generally must decide within 30 days, or 72 hours if expedited.
If the plan upholds its denial, it must send your case to an outside reviewer, the Independent Review Entity (IRE), on the same 30-day or 72-hour schedule. You do not have to request this. If the IRE also denies the case, the remaining levels are the same as in Original Medicare: an ALJ hearing, the Medicare Appeals Council and federal court, with the same dollar thresholds.
If waiting could seriously harm your health, ask your doctor to request an expedited decision. When a doctor says the faster timeline is needed, the plan has to use it.
Fast appeals: when care is ending now
A fast appeal is for Medicare-covered care that is about to stop. It is available in Original Medicare and Medicare Advantage. A Beneficiary and Family-Centered Care Quality Improvement Organization (BFCC-QIO) reviews it. The QIO is independent of the hospital, your plan and Medicare.
- Hospital discharge. You receive an "Important Message from Medicare" near admission and again close to discharge. It explains your right to appeal if you think you are being sent home too soon. To appeal, contact the BFCC-QIO by midnight of your discharge day. The hospital must give you a Detailed Notice of Discharge with its reasons. The QIO generally decides about 24 hours after it has the information it needs, and no later than 72 hours.
- End of skilled nursing, home health or hospice services. You receive a Notice of Medicare Non-Coverage (NOMNC) at least two calendar days before covered services end. Medicare Advantage plans use their own version of the form. To appeal, contact the BFCC-QIO by noon of the day before services are due to end. The QIO generally decides within about two days.
If you ask for the fast appeal by the deadline on your notice, you generally do not have to pay for the continued care while the QIO decides. The QIO's phone number is printed on the notice. Call it yourself, or have a family member call. Telling the hospital staff that you disagree does not start the appeal.
Frequently Asked Questions
What are the 5 levels of a Medicare appeal?
Redetermination by a Medicare Administrative Contractor, reconsideration by a Qualified Independent Contractor, a hearing before an Administrative Law Judge at the Office of Medicare Hearings and Appeals, review by the Medicare Appeals Council, and judicial review in federal district court. You generally have 120 days to request a redetermination, 180 days to request a reconsideration, and 60 days for each level after that.
What is an Advance Beneficiary Notice (ABN)?
An ABN is a written notice a provider must give you before a Medicare Part B item or service when they believe Medicare may not pay for it, for example because of medical necessity, a frequency limit or an experimental service. It lets you decide in advance whether to get the service and accept that you may have to pay. If a provider does not give you a valid ABN when one is required, they generally cannot bill you if Medicare denies the claim.
Does an ABN apply to Medicare Advantage plans?
No. The ABN is used only in Original Medicare Part B. A Medicare Advantage plan that denies a request must send its own written notice, the Notice of Denial of Medical Coverage or Payment, also called the Integrated Denial Notice. It gives the reason and your appeal rights.
What is a Medicare fast appeal and how fast is it?
A fast (expedited) appeal is for Medicare-covered care that is ending, such as a hospital discharge or the end of skilled nursing, home health or hospice services. It is available in Original Medicare and Medicare Advantage. You contact a BFCC-QIO, an independent review organization, by the deadline on your notice, and it generally decides within about 24 to 72 hours. If you appeal on time, you generally do not pay for continued care while the decision is pending.
How is appealing a Medicare Advantage denial different from Original Medicare?
A Medicare Advantage plan first makes an organization determination, generally within 14 days, or 72 hours if expedited. If it denies the request, you have 65 days to ask for a plan reconsideration, which the plan must decide within 30 days, or 72 hours if expedited. If the plan upholds the denial, it must send the case to an outside Independent Review Entity automatically. After that, the levels are the same as in Original Medicare: an ALJ hearing, the Medicare Appeals Council and federal court.
This article explains general federal Medicare appeal, ABN and fast-appeal rules as of October 2026 and is not legal or medical advice. Exact deadlines, forms and phone numbers are on the notice you receive, so follow the instructions on your own Medicare Summary Notice, denial letter, ABN or NOMNC. For free help with an appeal, contact your State Health Insurance Assistance Program (SHIP) or Medicare at 1-800-MEDICARE.