To overturn a Medicare Advantage denial, file a Level 1 reconsideration with the plan within 65 days of the notice date, per CMS, including the doctor's order and a letter of medical necessity. The plan must decide a standard request within 30 days, or within 72 hours if expedited. It is worth doing: in 2024, 80.7% of appealed prior-authorization denials were overturned, according to KFF. If the plan upholds the denial, the appeal advances automatically to an independent reviewer.
Appeals
How to Get a Medicare Advantage Denial Overturned: Step-by-Step for a Parent's Case (2026)
By Chuck Brodsky, Co-Founder, MediNav — Updated July 2026 — 7 min read
Quick answer
If a Medicare Advantage plan has denied care your parent's doctor ordered, a denial is not the end — it is the start of a process that families win far more often than they expect. The key is filing correctly and on time, with the right evidence.
Step 1: Get the denial in writing and read it
Ask the plan for the written denial and the specific reason. The notice explains the appeal steps and the deadline. Identify whether this is a pre-service denial (care not yet received) or a payment denial (care already given), because the timelines differ slightly. Start from the plan's own appeals hub guidance and note the notice date.
Step 2: Gather the evidence that wins appeals
The single most effective document is a letter of medical necessity from the ordering physician, explaining why the service is needed and citing the clinical facts. Add the relevant records, the doctor's order, and anything the denial says was missing. Denials are frequently overturned because the appeal supplies the clinical justification the initial review lacked.
Step 3: File the Level 1 reconsideration on time
File the reconsideration with the plan within 65 days of the notice date. Request an expedited appeal if waiting could seriously harm your parent's health — the plan must then decide within 72 hours instead of the standard 30 days. Submit through the method the notice specifies, and keep proof of the date you filed.
Step 4: Know the levels above the plan
If the plan upholds its denial, the case moves automatically to Level 2, an independent review entity outside the plan. Beyond that are three further levels: an administrative law judge, the Medicare Appeals Council, and federal court. Most cases that have merit are resolved well before the higher levels, but the escalating path is why persistence pays. For the exact filing window, see how long a parent has to appeal.
Step 5: Use the right track for the situation
Not every dispute is an appeal. A complaint about service quality or plan conduct is a grievance, a separate process — see grievance versus appeal. And a hospital discharge that feels too soon has its own fast QIO appeal. Matching the problem to the correct track avoids wasted time.
When to call MediNav
- Free: Ask a specific question — describe your parent's denial and get a straight answer on how to appeal and what to send.
- Free: Run the coverage check — in about two minutes, see what a parent is likely eligible for with 2026 figures for your state.
- Paid ($9–$19/mo): MediNav Watch and Watch+ re-check the figures as they change each year and remind you before deadlines, so nothing lapses unnoticed.
Related guides
- Appeal a Medicare Denial for a Parent — the step-by-step appeals hub
- How Long to Appeal a Denial — the 65-day window and timelines
- Grievance vs. Appeal — which channel fits your problem
- What the 2024 Appeal Data Shows — how often appeals succeed
Frequently asked questions
What if waiting for a decision could harm my parent?
Request an expedited appeal. When a standard timeline could seriously jeopardize your parent's health or function, the plan must decide within 72 hours rather than 30 days. A supporting statement from the physician strengthens the request. Mark the notice date and file the reconsideration within 65 days regardless.
How likely is an appeal to succeed?
More likely than most families assume. In 2024, 80.7% of appealed Medicare Advantage prior-authorization denials were overturned, per KFF, yet most denials are never appealed. Filing with a physician's letter of medical necessity puts your parent in the group that frequently wins.
What is the deadline to appeal?
File the Level 1 reconsideration within 65 days of the date on the denial notice. The underlying rule is 60 days from receipt, with a 5-day mail presumption, which CMS states operationally as 65 days from the notice date. If the window has passed, you can still file with a good-cause explanation.
What document matters most?
A letter of medical necessity from the ordering doctor. It explains, in clinical terms, why the denied service is needed, and it often supplies exactly what the plan's initial reviewer said was missing. Pair it with the order and relevant records for the strongest appeal.
What happens if the plan denies again?
The case advances automatically to an independent review entity at Level 2, outside the plan. Further levels include an administrative law judge, the Medicare Appeals Council, and federal court. You do not have to re-file to reach Level 2; the plan forwards an upheld denial for independent review.
Is a denial the same as a grievance?
No. An appeal disputes a coverage or payment decision; a grievance is a complaint about quality or service. Using the wrong process delays resolution. If your parent's issue is that care was refused, it is an appeal — see the grievance-versus-appeal guide to be sure you are on the right track.
Sources: CMS — Reconsideration by the Medicare Advantage health plan (Part C), KFF — Medicare Advantage prior authorization in 2024. Last verified July 2026.