Medicare Claim Denied? How to Appeal: Complete 2026 Guide

Medicare denials affect millions of Americans every year. Whether it's Part A (hospital), Part B (outpatient/medical), Part C (Medicare Advantage), or Part D (prescription drugs), you have the right to appeal — and Medicare appeals have some of the most structured and protective processes of any insurance.

Medicare's 5-Level Appeal System

Medicare has a formal 5-level appeal process:

Level 1: Redetermination — Request that Medicare or your Medicare plan review the denial. Filing deadline: 120 days from the denial notice for Parts A and B; 60 days for Medicare Advantage.

Level 2: Reconsideration — For Original Medicare, a Qualified Independent Contractor (QIC) reviews. For Medicare Advantage, an Independent Review Entity (IRE) reviews. Filing deadline: 180 days from Level 1 decision.

Level 3: ALJ (Administrative Law Judge) Hearing — If the amount in controversy meets the threshold ($190+ in 2026 for most appeals), you can request a hearing before an ALJ. Filing deadline: 60 days from Level 2 decision.

Level 4: Medicare Appeals Council (MAC) — Further appeal to the MAC within the Department of Health and Human Services. Filing deadline: 60 days from Level 3 decision.

Level 5: Federal Court — If the amount in controversy meets the threshold ($1,760+ in 2026), you can appeal to federal district court. Filing deadline: 60 days from Level 4 decision.

Medicare Part A: Hospital and SNF Appeals

For inpatient hospital care denied or cut short:

The hospital must give you a "Notice of Medicare Non-Coverage" when it determines your care isn't medically necessary or you're ready for discharge. You can appeal immediately — before leaving the hospital — using the expedited QIO (Quality Improvement Organization) process.

• Contact your Beneficiary and Family Centered Care QIO (BFCC-QIO) immediately
• Your QIO must decide within 1 business day if you ask for a quick appeal while still in the hospital
• You won't be responsible for the hospital costs during the appeal review

For skilled nursing facility (SNF) care denied:

Post-hospital SNF coverage requires:

• 3-day qualifying hospital inpatient stay (not observation status)
• Related condition requiring skilled nursing or rehab care
• Covered Medicare skilled care (not custodial/maintenance care only)

Important: The Jimmo v. Sebelius settlement (2013) established that SNF coverage cannot be denied solely because the patient isn't "improving" — maintenance of function or prevention of decline qualifies as skilled care under Medicare.

Medicare Part B: Outpatient Medical Services

Common Part B denial reasons:

• Frequency of service exceeds allowed frequency (e.g., more than one eye exam per year for certain beneficiaries)
• Service not medically necessary per LCD (Local Coverage Determination)
• Wrong diagnosis code submitted

Key resource: Find the applicable LCD for your denied service at CMS.gov. LCDs define coverage criteria for specific services in each Medicare Administrative Contractor (MAC) region. If your service met the LCD criteria, cite this in your appeal.

Medicare Part C: Medicare Advantage Appeals

Medicare Advantage plans have their own appeal processes — similar to commercial insurance — but must follow Medicare guidelines:

For denied services: File with your Medicare Advantage plan. They must decide:

• Expedited appeals: 72 hours
• Standard pre-service appeals: 7 calendar days (prior auth)
• Claims appeals (post-service): 60 calendar days

If the Medicare Advantage plan denies your appeal, the Independent Review Entity (IRE, currently Maximus Federal Services) conducts an independent review.

Medicare Part D: Prescription Drug Appeals

Step 1: Coverage Determination — Ask your Part D plan to make a coverage decision (exception request). Timelines: standard 72 hours, expedited 24 hours.

Step 2: Redetermination — 7-day standard, 72-hour expedited.

Step 3: IRE Reconsideration — The IRE reviews within 7 days (standard) or 72 hours (expedited).

Common Part D appeal strategies:

• Formulary exception: Request that a non-formulary drug be covered. Your doctor must certify medical necessity and explain why formulary alternatives would be ineffective or cause adverse effects
• Step therapy exception: Document that required step therapy drugs are contraindicated or have already been tried and failed
• Coverage gap: The Part D "donut hole" is significantly reduced post-Inflation Reduction Act, but some drugs still have coverage gaps

How to Request an Expedited Medicare Appeal

For urgent situations (delay would seriously harm your health):

• State explicitly: "I am requesting EXPEDITED review"
• Cite the medical urgency: "Delay of this [medication/service] would [specific harm]"
• Get your physician to support the expedited request

Tips for Successful Medicare Appeals

1. Know your deadline — Missing appeal deadlines usually forfeits your rights at that level. Act quickly.

2. Keep copies of everything — All notices, letters, medical records, your appeal submissions.

3. Get your doctor involved — A physician's letter supporting medical necessity dramatically strengthens any Medicare appeal.

4. Use the LCDs as your guide — Whatever criteria Medicare applies to your service, those criteria are public. Find them and show your service meets them.

5. Request your file — You're entitled to a copy of your claim file before your appeal.

6. Don't stop at Level 1 — Level 1 redeterminations are decided by the same people who made the initial decision. The higher levels (QIC, IRE, ALJ) use independent reviewers who overturn decisions at higher rates.

Fight Back With ClaimBack

ClaimBack generates Medicare appeal letters for Parts A, B, C, and D — citing applicable LCDs, the Jimmo settlement, ERISA rights for Medicare Advantage, and the specific clinical criteria that apply to your denied service.

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Related Reading

• How to Write an Insurance Appeal Letter That Works
• Internal vs External Insurance Appeal: Which Should You Choose?
• What Is Medical Necessity and How to Prove It