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

Medicare Advantage plans deny more claims than traditional Medicare—but they must follow CMS appeal rules. This step-by-step guide covers every level of the MA appeal process, with timelines and documentation requirements.

Why Medicare Advantage Denials Are Different

Medicare Advantage plans operate under CMS oversight but have significant discretion in their coverage policies and utilization management. The result: MA plans deny a substantially higher percentage of claims than traditional Medicare. A 2023 KFF analysis found that MA plans denied 6.6% of prior authorization requests—far higher than fee-for-service Medicare denial rates. More concerning, CMS's own audits have found that MA plans frequently deny care that meets Medicare coverage standards.

The good news: MA plans must follow a structured appeals process under 42 CFR Part 422. The process has five levels, and winning at Levels 1–3 is achievable with good documentation and persistence.

Before You Appeal: Understand the Denial

Every MA denial must include a written notice with:

The specific reason for the denial
The Medicare coverage criterion cited
Information about the appeals process and deadlines
The patient's right to a free interpreter if English is not their primary language

Read the denial notice carefully. The stated reason matters: a denial for "not medically necessary" requires a different appeal strategy than a denial for "not a covered benefit" or a "prior authorization not obtained" denial. Document the denial reason code, the date of denial, and every deadline listed in the notice.

Level 1: Plan Redetermination

Who reviews: A different staff member within the MA plan than the person who made the initial determination.

Deadline: You have 60 days from the date of the denial notice to request a redetermination.

MA plan timeline: 60 days for standard redeterminations; 72 hours for expedited (urgent care) requests.

What to submit:

Completed plan redetermination request form (available on the plan's website or by calling member services)
Copy of the original denial notice
Office notes and relevant medical records supporting medical necessity
Letter of medical necessity from the treating physician
Applicable clinical guidelines (CMS National Coverage Determinations, Local Coverage Determinations, specialty society guidelines)
Published literature supporting the treatment (PubMed citations)

Expedited request criteria: When the standard timeline would seriously jeopardize the patient's life, health, or ability to regain maximum function. Document the clinical urgency explicitly in your request.

Level 2: Qualified Independent Contractor (QIC) Review

Who reviews: An independent organization contracted by CMS—not affiliated with the MA plan.

Deadline: 60 days from the date of the plan's redetermination denial notice.

QIC timeline: 60 days standard; 72 hours expedited.

QIC review is a genuinely independent clinical review. QICs are required to apply Medicare coverage rules—not the MA plan's supplemental coverage policies—when determining medical necessity. This is important: some MA denials rely on plan-specific utilization management criteria that are more restrictive than underlying Medicare rules. The QIC applies the Medicare standard and frequently overturns denials that the plan upheld internally.

When submitting to the QIC, add: a focused argument that the service meets Medicare coverage standards under the applicable NCD or LCD, and explicitly state if the plan's denial relied on internal criteria more restrictive than Medicare's coverage rules. CMS prohibits MA plans from applying more restrictive criteria than traditional Medicare for services covered by Medicare.

Level 3: ALJ Hearing

Who reviews: An Administrative Law Judge in the Office of Medicare Hearings and Appeals (OMHA).

Threshold: The amount in controversy must meet the statutory minimum (currently $180 for 2026; adjusted annually for inflation).

Deadline: 60 days from the date of the QIC decision.

ALJ timeline: CMS targets 90 days, but ALJ hearing scheduling has significant backlogs—actual wait times are often 12–24 months due to case volume.

What changes at Level 3: The ALJ can accept new evidence, hear testimony, and apply Medicare law independent of both the plan and the QIC. ALJs are required to conduct de novo review—they are not bound by the QIC's analysis. Overturn rates at the ALJ level for Medicare coverage disputes have historically run 40–60%, though rates vary significantly by case type.

Levels 4 and 5: Medicare Appeals Council and Federal Court

Level 4 (Medicare Appeals Council) and Level 5 (Federal District Court) are available for cases where the ALJ decision is unfavorable. These levels are practically reserved for high-value disputes ($1,870+ in controversy for federal court) or cases involving novel Medicare coverage questions. Most physician practice appeals resolve at Levels 1–3.

Parallel Track: CMS Complaint and Coverage Determination

In addition to formal appeals, you and your patients have two additional remedies:

CMS complaint: File a complaint with CMS (1-800-MEDICARE or through Medicare.gov) when the MA plan violates its coverage rules, fails to meet appeal deadlines, or engages in inappropriate denial patterns. CMS investigates plan-level complaints and can impose corrective action plans or civil monetary penalties.
State Insurance Commissioner complaint: MA plans operate under state insurance oversight in addition to CMS oversight. Filing a complaint with your state's insurance department creates a second regulatory track and sometimes produces faster resolution than the formal Medicare appeal process.

Documentation Template for Level 1 Appeal Letter

Structure your appeal letter as follows:

Opening: State patient name, MA plan ID, date of denial, and the specific service denied.
Clinical summary: Brief statement of diagnosis, treatment rationale, and why the service is clinically necessary for this patient.
Medicare coverage standard: Cite the applicable NCD or LCD by number and title. State explicitly that the service meets those criteria.
Evidence summary: List attached clinical records and published literature, with a one-sentence summary of how each supports medical necessity.
Legal framework (if relevant): If the plan applied more restrictive criteria than Medicare, cite 42 CFR §422.101 (MA plans must cover services that are medically necessary under Medicare Part A and B standards).
Request: State specifically: "We request that you reverse the denial and approve [specific service] for [patient name]."

Tracking Appeals in Your Practice

Maintain a denial and appeal log that tracks: patient name, payer, service denied, denial reason code, appeal level, submission date, response date, and outcome. This data identifies payers with abnormally high denial rates and measures your appeal success rate by denial reason—insights that help you allocate appeal effort more effectively. Krasyn's billing module tracks prior auth and denial status by patient. See how it works.