How to Appeal a Medicare Advantage Denial: Step-by-Step Guide

Medicare Advantage (MA) plans — also called Medicare Part C — are private insurance plans that provide Medicare benefits. While they must cover everything Original Medicare covers, MA plans frequently deny claims at higher rates and impose additional restrictions like Prior Authorization Denied: How to Appeal" class="auto-link">prior authorization, network requirements, and utilization review that Original Medicare does not. A 2022 report from the HHS Office of Inspector General found that MA plans denied 13% of prior authorization requests that actually met Medicare coverage criteria. The good news: Medicare has one of the most structured appeal systems in American healthcare, with five levels of review and clear consumer protections established under 42 C.F.R. Part 422, Subpart M.

Why Medicare Advantage Plans Deny Claims

MA plans deny claims for several common reasons: the plan's own prior authorization criteria are stricter than Original Medicare coverage rules; a service is classified as not medically necessary under the plan's internal criteria; the provider is out of network, which MA plans can restrict (unlike Original Medicare); the plan's formulary excludes a medication or imposes quantity limits; or a hospital discharge is proposed before the treating physician believes it is safe. Under 42 C.F.R. Section 422.101, MA plans are required to cover all services that Original Medicare covers — so any denial of a Medicare-covered service is legally challengeable. Medicare National Coverage Determinations (NCDs) and Local Coverage Determinations (LCDs), publicly available at cms.gov/medicare-coverage-database, define what Original Medicare covers and form the legal baseline for every MA appeal.

How to Appeal a Medicare Advantage Denial

Step 1: File a Reconsideration Request (Level 1)

You have 60 days from the initial denial — called an Organization Determination — to file a written reconsideration request with your MA plan. This is shorter than the 180-day deadline for commercial plans, so act quickly. The denial notice must include the plan's appeals department address. Your reconsideration letter should cite the specific NCD or LCD that supports coverage of your service and state that your MA plan is required to cover all Original Medicare services under 42 C.F.R. Section 422.101. If the internal reconsideration upholds the denial, the plan must automatically forward your case to the Independent Review Entity (IRE) — currently Maximus Federal Services — for Level 2 review. You do not need to file a separate request.

Step 2: Request Expedited Review If Urgent

If the standard timeline would seriously jeopardize your life, health, or ability to regain maximum function, request an expedited reconsideration. Under 42 C.F.R. Section 422.570, the plan must decide within 72 hours for expedited cases. If your physician supports the expedited request, the plan must grant it. Include language such as: "I am requesting an expedited reconsideration because the standard timeframe would seriously jeopardize my health. My physician, Dr. [Name], supports this request." For ongoing treatment being terminated, you can also request that treatment continue at the current level during the appeal.

Step 3: Independent Review Entity Review (Level 2)

If the plan upholds the denial, your case is automatically forwarded to Maximus Federal Services (1-855-882-1597 or medicareappeal.com). Submit any additional evidence directly to the IRE — new medical records, updated physician letters, or clinical guidelines not included in the reconsideration. The IRE must decide within 30 days for standard cases and 72 hours for expedited cases. If the IRE overturns the denial, the MA plan must comply. If the IRE upholds the denial, the notice will explain how to request a Level 3 ALJ hearing.

Step 4: Administrative Law Judge Hearing (Level 3)

If the IRE upholds the denial and the amount in dispute meets the threshold ($180 for 2024, adjusted annually), you can request a hearing before an Administrative Law Judge at the Office of Medicare Hearings and Appeals (OMHA). File within 60 days of the IRE decision. Hearings can be conducted by phone, video, or in person. You can have a representative present your case, submit new evidence, and provide testimony. The ALJ conducts an independent review and is not bound by the plan's or IRE's decision. You can file online at hhs.gov/omha.

Step 5: Medicare Appeals Council and Federal Court (Levels 4 and 5)

If the ALJ rules against you, request review by the Medicare Appeals Council within 60 days. File with the Departmental Appeals Board. If the Appeals Council rules against you and the amount in dispute meets the federal court threshold ($1,840 for 2024), you can file suit in federal district court within 60 days. At this level, legal representation is strongly advisable.

Step 6: Use Medicare-Specific Protections

For hospital discharges you believe are premature, call the Quality Improvement Organization (QIO) in your state before the discharge takes effect. While the QIO reviews your case, the plan cannot charge you for the continued hospital stay; the QIO typically decides within 24 hours. For complaints about MA plan practices, file through Medicare's Complaints Tracking Module at 1-800-MEDICARE (1-800-633-4227) or medicare.gov — complaints are tracked and can trigger CMS audits of the plan.

What to Include in Your Appeal

• Specific NCD or LCD citation demonstrating Original Medicare covers the denied service, which the MA plan must also cover under 42 C.F.R. Section 422.101
• Treating physician's letter addressing the plan's specific denial criteria and documenting medical necessity
• Request for expedited review with physician support, if the standard timeline would jeopardize health
• Statement requesting automatic IRE forwarding under 42 C.F.R. Section 422.590 if the reconsideration is unfavorable
• Complete timeline of the claims process with reference numbers for every interaction

Fight Back With ClaimBack

Medicare Advantage appeals have a structured five-level process and clear federal coverage standards. A well-documented appeal that cites the applicable NCD or LCD has a strong chance of reversal at the IRE or ALJ levels. ClaimBack generates a professional appeal letter in 3 minutes. Start your free claim analysis → Free analysis · No credit card required · Takes 3 minutes

Related Reading

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity?
• Internal vs External Insurance Appeal