Medicare ABN Explained for Seniors: Before You Sign

Last updated: May 27, 2026

Bottom Line: A Medicare Advance Beneficiary Notice of Noncoverage, often called an ABN, is a warning. It is not a final Medicare denial. It means a provider thinks Original Medicare may not pay for a certain test, item, visit, or service. If you still want the care and there is any chance Medicare should pay, Option 1 is usually the safest box. It sends the claim to Medicare and keeps your appeal rights.

Do not sign a blank or vague ABN. Before you sign, make sure the form names the exact service, gives a real reason Medicare may not pay, and shows an estimated cost. If you have Medicaid, the Qualified Medicare Beneficiary program, or a Medicare Advantage plan, pause and get help before paying.

Emergency help now

Do not let a rushed signature decide the bill: if you are handed an ABN right before care, ask for a minute to read it. The provider should explain it and answer questions before you sign.

1. If the form is blank or vague: do not sign until the office fills in the exact item, test, service, or care, the reason Medicare may not pay, and the estimated cost.
2. If you still need the care: in most cases, choose Option 1 so Medicare gets the claim and you can appeal if Medicare denies it.
3. If you are being asked to pay now: ask whether the provider will bill Medicare first. If you chose Option 1, ask the office to wait for Medicare’s decision before treating the charge as final.
4. If you have Medicaid or QMB: tell the office before signing or paying. QMB billing rules can change what the office may collect.
5. If this is an emergency: focus on care first. CMS says ABNs are never required in emergency situations.

Quick help before you sign

Use this table at the desk: it helps you decide what to ask before you check a box.

Contents

• What an ABN means
• Check the form
• Choose the right option
• Medicaid, QMB, Advantage
• When ABNs are used
• Invalid ABN signs
• Start without wasting time
• Documents to keep
• Denied or delayed
• Official help

What an ABN really means

An ABN is a warning notice: it tells you the provider thinks Original Medicare may not pay. Medicare explains on its Medicare protections page that an ABN lists the item or service, an estimated cost, and the reason Medicare may not pay.

The key word is “may.” An ABN does not prove Medicare will deny the claim. Medicare has not made the decision yet. That decision comes later if the claim is sent to Medicare.

An ABN is mainly an Original Medicare issue. Original Medicare means Medicare Part A and Part B, not a Medicare Advantage plan. If you are not sure what kind of Medicare you have, look at your card and call your plan or Medicare before signing anything that could create a large bill.

Current form check: CMS says on the CMS ABN page that the updated ABN is effective now, expires March 31, 2029, and the old expired form could be used only until May 12, 2026. As of May 27, 2026, a provider should be using the current approved form.

The standard form name is CMS-R-131. You may also see the full name “Advance Beneficiary Notice of Noncoverage.” Some offices call it a Medicare waiver. Whatever name staff use, read the boxes before signing.

Check the form before signing

A good ABN should be clear enough for you to decide: the CMS ABN instructions say the notice should be given before the service, reviewed with the patient, and delivered far enough in advance for an informed choice.

Ask this simple question: “Is this service never covered by Medicare, or do you think Medicare may deny it in my case?” That answer matters. When a service is never covered, the ABN may be used only as a warning, and you may not need to choose a box or sign.

Which ABN option to choose

The boxes are not equal: Option 1, Option 2, and Option 3 lead to very different results.

Best plain-English rule: if the service matters and there is any chance Medicare should cover it, Option 1 is usually the safest choice. It keeps the claim alive.

After Medicare processes a claim, the official answer appears on your Medicare Summary Notice. Medicare says the MSN page is not a bill. It shows what providers billed, what Medicare paid, and the most you may owe. Our guide on reading the MSN can help you compare the ABN, the bill, and the Medicare decision.

Special rules for Medicaid, QMB, or Medicare Advantage

If you have Medicaid too: tell the office before you sign or pay. People who have both Medicare and Medicaid are often called dual eligible. Our dual eligible guide explains how the two programs can work together.

If you have QMB: be extra careful. CMS says on its QMB page that Medicare providers and suppliers cannot bill people in the Qualified Medicare Beneficiary group for Medicare cost-sharing on Medicare-covered items and services. Our QMB billing guide explains what to do if a bill still arrives.

If you need help with Medicare costs: check Medicare Savings Programs. These programs can help some low-income Medicare members pay Part B premiums and other Medicare costs. Start with our Medicare Savings Programs guide if bills are already hard to manage.

If you have Medicare Advantage: do not assume this ABN process applies the same way. Medicare Advantage plans have plan notices, prior authorization rules, organization determinations, and appeals. If a plan denies care, our Advantage denial appeals guide is the better next step.

When providers usually use ABNs

ABNs often show up when Medicare covers a service in some cases, but the provider thinks your case may not meet the rule:

• Lab tests: the diagnosis may not support the test, or Medicare may have a frequency limit.
• Imaging or therapy: the office may think Medicare will say it is not medically reasonable and necessary.
• Durable medical equipment: an upgraded item, extra feature, or special supply may not be covered.
• Non-emergency ambulance: the provider may think Medicare will deny the trip or level of transport.
• Home health: the agency may think the patient is not homebound, does not need skilled care, or needs only personal care. Our home health denials guide covers that path.
• Hospice-related items: the issue may be whether the item or service is related to the terminal illness or part of palliative care.

An ABN is not the same as a notice that covered care is ending. If home health, skilled nursing, rehab, or hospice care is ending, the deadline may be much faster. Use our Medicare fast appeals guide when the notice is about care stopping or changing.

When an ABN may be invalid

A bad ABN can change who pays: do not ignore warning signs. Keep the paper and write down what happened.

How to start without wasting time

Follow this order: it protects your money and appeal rights.

1. Read the service line first. Make sure the ABN lists the exact care you may get today.
2. Read the reason next. Ask staff to explain why Medicare may deny this specific service for you.
3. Check the estimate. Ask whether it includes doctor, facility, lab, equipment, and add-on costs.
4. Choose the box yourself. Do not accept a form where the office already chose for you.
5. Ask for your copy. If the form is electronic, ask for a printed copy before you leave.
6. Track the claim. If you chose Option 1, watch your secure Medicare account or your MSN.
7. Get free help if stuck. A local SHIP counselor can help you compare the ABN, bill, and Medicare decision. Our SHIP and SMP guide explains that free help.

Phone scripts you can use

Script for the front desk: “I need to understand this before I sign. Please show me the exact service, the reason Medicare may not pay, and the estimated cost.”

Script for the billing office: “I chose Option 1. Please confirm the claim will be sent to Medicare and that my account will stay on hold until Medicare decides.”

Script for Medicare: “I was given an ABN for a service. I need to know whether a claim was filed and what deadline I have if I need to appeal.” Medicare’s contact page lists 1-800-MEDICARE and TTY 1-877-486-2048.

Script for SHIP: “I need help reading an ABN and a Medicare bill. I want to know whether I kept appeal rights and what paper to send next.” Use the SHIP finder to reach free local Medicare counseling.

Documents to keep

Keep the paper trail together: one missing page can slow down a billing dispute or appeal.

• Copy of the ABN, signed or unsigned
• Doctor order, referral, or visit note
• Written estimate from the provider
• Any bill or collection letter
• Medicare Summary Notice or electronic MSN printout
• Doctor note explaining why the service was medically needed
• Proof of Medicaid, QMB, Medigap, or other coverage
• Names, dates, and phone numbers from every call
• Representative papers, if a helper will act for the senior

A caregiver may need permission before Medicare can share private health details. Medicare’s privacy forms page includes the authorization form. If a helper will file an appeal, the appeals forms page has the representative form and redetermination form.

If Medicare denies, delays, or no claim appears

If Medicare denies the claim

Appeal from the MSN, not from memory: Medicare says on the appeals page that Original Medicare has five appeal levels. The first level is a redetermination. The MSN gives the appeal deadline, and CMS says a redetermination request is generally due within 120 days from receipt of the first claim decision.

Circle the denied item on a copy of the MSN. Write why you disagree. Add a copy of the ABN, the doctor’s order, and any medical-necessity note. At level 1, Medicare says the contractor generally gives a decision within 60 days after receiving the appeal. For 2026, the minimum amount for an Administrative Law Judge hearing is $200.

If the provider never filed the claim

Ask the provider to file first: if you chose Option 1, the office should send the claim to Medicare. If the office still refuses, Medicare’s claims page explains when a patient may file a claim. Ask Medicare for the exact filing deadline for your service before time runs out.

If the bill came too soon

Ask for a hold: tell the billing office that Medicare has not made a final decision yet. If Medicare pays later, the provider should refund any amount you paid beyond the normal deductible or coinsurance.

If the bill is going to collections

Dispute in writing: say that the ABN was missing, vague, late, pre-selected, or not explained, if that is what happened. If the issue has already become a debt problem, our medical debt rights guide can help you slow down and document the dispute.

If this is not really an ABN issue

Some bills involve surprise billing rules, good faith estimates, or out-of-network charges instead of Original Medicare ABN rules. Our No Surprises Act guide explains that different path.

Reality checks and common mistakes

Reality check: a signed ABN does not always mean the bill is correct. It also does not always mean Medicare will deny. The facts, the claim, and the notice all matter.

• Do not choose Option 2 by accident. It is not the safe middle ground. It tells the provider not to bill Medicare.
• Do not pay without checking the MSN. Compare the bill with Medicare’s decision first.
• Do not forget other coverage. Tell the office if you have Medicaid, QMB, Medigap, employer retiree coverage, or another payer.
• Do not throw away the ABN. Keep it with your bill and MSN.
• Do not assume Medicare Advantage uses the same form. Call the plan before signing or paying.
• Do not miss the appeal deadline. The appeal date is on the MSN, and late appeals are harder.
• Do not argue only by phone. Phone calls help, but written records protect you better.

Official help and useful links

Start with official help when money is at risk:

• Use Medicare’s coverage tool to check many items and services before agreeing to a large bill.
• Use Care Compare when you need to check Medicare providers, facilities, or suppliers.
• Use an electronic MSN if you want claim updates faster than waiting for paper mail.
• Contact the BFCC-QIO page if the notice is about fast appeal rights or care ending, not a normal ABN.

When you call, have your Medicare number, the date of service, provider name, ABN copy, and bill in front of you. Ask the person to repeat the next deadline before you hang up.

FAQ

Is an ABN a Medicare denial?

No. An ABN is a warning before the service. Medicare makes the official decision later if the claim is sent to Medicare.

Which ABN option is safest for most seniors?

If you still want the care and there is any chance Medicare should pay, Option 1 is usually safest because it sends the claim to Medicare and keeps appeal rights.

What happens if I choose Option 2?

You get the service, but Medicare is not billed. That means you usually cannot file a normal Medicare appeal later.

What if the office already checked a box?

Ask for a clean form. The patient or representative should choose the box. A pre-selected option is a serious warning sign.

Can an ABN be used in an emergency?

CMS says ABNs are never required in emergency situations. If you were pressured during an emergency, write that down and use it in any dispute.

What if I have QMB?

Tell the provider before signing or paying. QMB members have strong billing protections for Medicare-covered items and services.

Does an ABN work the same with Medicare Advantage?

No. Standard ABN rules are for Original Medicare. Medicare Advantage plans use plan rules, notices, prior authorization, and plan appeals.

What should I do if Medicare denies after Option 1?

Use the MSN to appeal. Circle the denied item, explain why Medicare should pay, and include support from your doctor when possible.

Resumen en español

Punto clave: Un ABN de Medicare no es una negación final. Es una advertencia de que el proveedor cree que Medicare Original tal vez no pague un servicio, examen, artículo o cuidado específico.

Si la persona mayor todavía necesita el servicio, la opción más segura suele ser la Opción 1. Esa opción pide que el proveedor envíe la reclamación a Medicare y mantiene el derecho de apelación si Medicare dice que no. La Opción 2 es más riesgosa porque Medicare no recibe la reclamación y normalmente no hay apelación. La Opción 3 significa que la persona no quiere el servicio indicado en el ABN.

Antes de firmar, pida que el formulario muestre el servicio exacto, la razón por la que Medicare puede negar el pago y el costo estimado. Si usted tiene Medicaid, QMB, o un plan Medicare Advantage, pida ayuda antes de pagar.

About This Guide

This guide uses official federal, state, local, and other high-trust nonprofit and community sources mentioned in the article.

Editorial note: This guide is produced based on our Editorial Standards using official and other high-trust sources, regularly updated and monitored, but not affiliated with any government agency and not a substitute for official agency guidance. Individual eligibility outcomes cannot be guaranteed.

Verification: Last verified May 27, 2026, next review August 27, 2026.

Corrections: Please note that despite our careful verification process, errors may still occur. Email info@grantsforseniors.org with corrections and we will respond within 72 hours.

Disclaimer: This article is for informational purposes only and is not legal, financial, medical, tax, disability-rights, immigration, or government-agency advice. Program rules, policies, and availability can change. Readers should confirm current details directly with the official program before acting.

Last updated: May 27, 2026. Next review: August 27, 2026.