Medicare Advantage Claim Denied? How to Appeal Your MA Plan

Medicare Advantage (MA) plans — also called Medicare Part C — are offered by private insurers approved by the Centers for Medicare & Medicaid Services (CMS). More than 30 million Americans rely on these plans, yet denials are common. In 2023, MA plans denied hundreds of millions of claims, many of which were later overturned on appeal. If your Medicare Advantage claim was denied, you have strong legal rights and a structured appeal process available to you.

Why Medicare Advantage Plans Deny Claims

MA plans deny claims for many reasons, including:

• Medical necessity: The plan determines a service was not medically necessary.
• Prior Authorization Denied: How to Appeal" class="auto-link">Prior authorization not obtained: The member or provider did not get pre-approval before receiving care.
• Out-of-network provider: Care was received from a provider not in the plan's network.
• Coding errors: Incorrect diagnosis or procedure codes on the claim.
• Coverage exclusions: The service falls under a plan exclusion.
• Coordination of benefits issues: Confusion about which plan is primary.

A denial is not final. Under federal law and CMS regulations, you have the right to appeal every denial.

The Five Levels of Medicare Advantage Appeal

CMS has established a five-level appeals process for Medicare Advantage denials. You must generally exhaust each level before moving to the next.

Level 1: Redetermination by the MA Plan

File your first appeal directly with your Medicare Advantage plan. You must submit your request within 60 calendar days of receiving the denial notice (the EOB)" class="auto-link">Explanation of Benefits, or EOB).

• For standard appeals, the plan must respond within 60 days for medical services or 7 days for prescription drugs.
• For expedited (fast-track) appeals when your health could be seriously harmed by delay, the plan must respond within 72 hours.

Submit your request in writing. Include a copy of the denial, medical records, a letter of medical necessity from your doctor, and any supporting documentation.

Level 2: Reconsideration by a Qualified Independent Contractor (QIC)

If the plan upholds the denial, you may escalate to an IROs) Explained" class="auto-link">independent review organization contracted by CMS called a Qualified Independent Contractor. File within 60 days of the plan's Level 1 decision.

The QIC is required to review the case independently, without deference to the plan's original determination. Standard timeframe is 60 days; expedited review must be completed within 72 hours.

Level 3: Office of Medicare Hearings and Appeals (OMHA)

If the QIC upholds the denial and the amount in controversy meets the minimum threshold (approximately $180 in 2025), you may request a hearing before an Administrative Law Judge (ALJ) at the Office of Medicare Hearings and Appeals. File within 60 days of the QIC decision.

ALJ hearings may be conducted by video or telephone. You can present new evidence, call witnesses, and have legal representation.

Level 4: Medicare Appeals Council (MAC)

If the ALJ rules against you, appeal to the Medicare Appeals Council within 60 days. The MAC is part of the Departmental Appeals Board at the U.S. Department of Health and Human Services.

Level 5: Federal District Court

If the MAC upholds the denial and the amount in controversy exceeds the threshold (approximately $1,760 in 2025), you may file suit in federal district court within 60 days of the MAC decision.

Key Tips for a Successful Appeal

Get your doctor involved. A letter of medical necessity from your treating physician is one of the most powerful pieces of evidence you can submit. Ask your doctor to explain why the service is clinically necessary and reference applicable clinical guidelines.

Request your claim file. You have the right to request a copy of all documents the plan used to make its decision. This is called a "coverage determination" file and can reveal weaknesses in the plan's reasoning.

Cite Medicare coverage rules. MA plans must cover everything that Original Medicare covers (and sometimes more). If Medicare would have covered the service, the MA plan generally must as well. Reference the Medicare Benefit Policy Manual and applicable Local Coverage Determinations (LCDs) in your appeal.

Act quickly. Deadlines in the MA appeals process are strict. Missing a deadline can forfeit your right to appeal at that level.

Request expedited review when health is at stake. If waiting for a standard timeline could seriously harm your health, explicitly request expedited (fast-track) review in writing.

Special Protections: Notices and Advance Decisions

Before your Medicare Advantage plan can discharge you from a hospital or end home health care, it must issue a written notice explaining its decision. You have the right to request an expedited review from a Beneficiary and Family Centered Care Quality Improvement Organization (BFCC-QIO) before discharge. This review must be completed within one business day.

What Happens If You Win

If your appeal is successful, the plan must cover the denied service and cannot retaliate against you or your providers. You may also be entitled to interest on any amounts owed if payment was delayed.

Fight Back With ClaimBack

Navigating a Medicare Advantage appeal is complex, but you do not have to do it alone. ClaimBack helps you build a strong, evidence-backed appeal letter that addresses the specific grounds for your denial, cites applicable Medicare regulations, and gives you the best possible chance of a reversal.

Start your appeal with ClaimBack

Related Reading

• How to Write an Insurance Appeal Letter
• Internal vs. External Insurance Appeals Explained
• Common Reasons Insurance Claims Are Denied