In 2024, 80.7% of appealed Medicare Advantage prior-authorization denials were overturned, according to KFF's January 2026 analysis. But only 11.5% of denials were appealed at all. Those two facts together are the real story for a caregiver: when families push back, they usually win, yet most denials are never challenged. Appealing a Medicare Advantage denial for a parent is worth the effort far more often than families assume.
Appeals
What the 2024 Data Actually Shows About Medicare Advantage Appeal Overturn Rates (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, the numbers are on your side — but only if you file. Understanding which statistic applies to your situation, and what each one actually measures, helps you decide whether to appeal and what to expect.
The headline figure, in context
The 80.7% overturn rate is the 2024 aggregate across appealed Medicare Advantage prior-authorization denials, per KFF's January 2026 report. It means that of the denials families and providers formally appealed, more than four in five were reversed. That is a strikingly high success rate, and it is the most representative general figure for a caregiver weighing whether to appeal a parent's denial. Start every appeal from the existing appeals hub and follow the deadlines closely.
The number that should bother you most
Only 11.5% of Medicare Advantage prior-authorization denials were appealed in 2024, according to the same KFF analysis. Pair that with the 80.7% overturn rate and the implication is hard to miss: a large share of denied care that would have been reinstated on appeal was simply accepted. For a caregiver, the lesson is not that the system is fair — it is that the appeal process works often enough that not using it leaves care on the table.
Two other figures — and why scope matters
You will see other overturn percentages, and they are not interchangeable. A June 2026 HHS Office of Inspector General report found a 95% overturn rate, but that figure is specifically for appealed skilled nursing facility admission denials — a narrow, high-stakes slice, not the overall rate. Separately, an older 2018 HHS OIG report cited a 75% overturn rate using 2014 through 2016 data; it is historical and should be labeled as such. Any responsible use of an appeal statistic states the year, the dataset, and the type of service it covers.
What high overturn rates suggest about initial denials
When such a large share of appealed denials is reversed, it raises a fair question about how many initial denials should have been approvals. Regulators have flagged exactly this concern. For a family, the practical takeaway is not to treat a first denial as the final word — it is frequently the beginning of a process that ends in approval.
How to act on these numbers
If your parent's Medicare Advantage plan denies a prior-authorization request, request the denial in writing, ask the ordering physician for a letter of medical necessity, and file the appeal within the deadline. The appeals hub walks through the steps. Given an 80.7% overturn rate on 2024 data, the effort is usually justified.
For related reading, see how long a parent has to appeal a Medicare Advantage denial and how prior-authorization denial rates have risen.
When to call MediNav
- Free: Ask a specific question — describe your parent’s Medicare Advantage denial and get a straight answer on whether to appeal.
- 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
- How Long to Appeal a Denial — the 65-day window and decision timelines
- How Denial Rates Rose to 7.7% — the trend behind the denials
- Appeal a Medicare Denial for a Parent — the step-by-step appeals hub
- A Parent’s Hospital Discharge Playbook — fast appeals during a hospital stay
Frequently asked questions
What if my parent's Medicare Advantage plan just denied a service — is it worth appealing?
Usually, yes. In 2024, 80.7% of appealed prior-authorization denials were overturned, per KFF. Most denials are never appealed, so filing puts your parent in the group that frequently wins. Get the denial in writing and a physician's letter of medical necessity, then file within the deadline.
Why do I see a 95% overturn rate quoted elsewhere?
That 95% figure is from a June 2026 HHS OIG report and applies specifically to appealed skilled nursing facility admission denials, not to all Medicare Advantage appeals. It is a narrow, high-stakes category. The general 2024 aggregate overturn rate is 80.7%, per KFF.
Is the 75% figure still accurate?
The 75% overturn rate comes from a 2018 HHS OIG report using 2014 through 2016 data, so it is historical. For current context, use the 80.7% figure from KFF's analysis of 2024 data. Always note the year and dataset when citing an appeal statistic.
How many denials actually get appealed?
In 2024, only 11.5% of Medicare Advantage prior-authorization denials were appealed, according to KFF. Given how often appeals succeed, that low rate means a substantial amount of denied care that could have been restored was never challenged.
Does a high overturn rate mean the denial was a mistake?
Not always, but a very high overturn rate suggests many initial denials do not hold up when reviewed. Regulators have raised concerns about initial denial practices. Treat a first denial as a step in a process rather than a final decision on your parent's care.
Where do I start an appeal for a parent?
Begin with the plan's denial notice, which explains the appeal steps and deadline, and use the appeals hub for a walkthrough. Gather the physician's order and a letter of medical necessity, and file the Level 1 reconsideration within the required window.
Sources: KFF — Medicare Advantage insurers made nearly 53 million prior authorization determinations in 2024, HHS OIG — MA organizations overturned nearly all appealed SNF admission denials (June 2026), HHS OIG — MA appeal outcomes (2018). Last verified July 2026.