A denial letter from a Medicare Advantage plan rarely arrives at a convenient time. One adult daughter helping her father recover from a hip fracture described opening the mail to find that his plan had denied additional days at a skilled nursing facility, the same week his doctor was recommending he stay. Her first instinct was to assume the decision was final. It wasn’t. Like most Medicare Advantage denials, it was the start of a formal process families have a right to use, not the end of one.
Prior authorization is the step where a Medicare Advantage plan reviews a request from a doctor or hospital before agreeing to cover a service, and a denial at that stage is officially called an organization determination. This guide walks through what a denial actually means, the appeal process and its five levels, the faster decision rules that took effect in 2026, and where families can get free help building a stronger case.
What a Prior Authorization Denial Means
Medicare Advantage (MA) plans can require prior authorization, meaning advance approval, before covering certain services like skilled nursing facility (SNF) stays, hospital admissions, some imaging, and durable medical equipment (DME). A denial means the plan has decided, at least for now, not to cover that specific request.
A few things worth knowing right away:
- A denial is not the same as a final decision. Families have a formal right to appeal, and appealed denials are overturned often enough that skipping the appeal can mean leaving covered care on the table.
- MA plans generally cannot deny a service that Original Medicare would cover, and cannot apply prior authorization criteria stricter than Original Medicare’s.
- The denial notice should explain why the request was denied and how to appeal. As of 2026, plans are required to give a specific reason, not a generic one.
What Changed in 2026: Faster Decisions, Specific Reasons
A federal rule from the Centers for Medicare & Medicaid Services (CMS) tightened the timeline plans have to decide a prior authorization request in the first place, before any appeal is even needed:
- Expedited (urgent) requests: a decision within 72 hours.
- Standard (non-urgent) requests: a decision within 7 calendar days, down from what was often 14 days before.
- Every denial must now include the specific reason for the decision, not a vague or boilerplate explanation.
These timeframes apply to Medicare Advantage plans (along with Medicaid managed care and CHIP), and took effect January 1, 2026. Knowing a plan’s response window can help families recognize when a decision is overdue.
The Five Levels of Appeal
Medicare’s appeals process for Medicare Advantage plans has five possible levels. Most families never need to go past the first one or two.
Level 1: Reconsideration by the Plan
- Filed directly with the MA plan, generally within 65 days of the denial notice.
- A doctor can request this on a patient’s behalf for a service not yet received.
- A stronger appeal typically includes the denial letter, a written statement of why the service is needed, and supporting notes from the treating physician.
Level 2: Independent Review Entity (IRE)
- If the plan upholds its own denial, the case is automatically forwarded to an IRE, a separate reviewer with no connection to the plan. Families don’t need to file a separate request for this step.
- The IRE follows the same response windows as the plan (72 hours expedited, up to 30 days standard for most pre-service requests).
Level 3: Office of Medicare Hearings and Appeals (OMHA)
- If the IRE upholds the denial, families have 60 days to request a hearing with an Administrative Law Judge (ALJ), or a review on the record without a hearing.
- For 2026, the case generally has to involve at least $200 in disputed value to qualify for this level.
Levels 4 and 5: Appeals Council and Federal Court
- Level 4: a review by the Medicare Appeals Council, requested within 60 days of the ALJ’s decision.
- Level 5: judicial review in federal district court, available if the case meets a $1,960 minimum for 2026 and is requested within 60 days of the Council’s decision.
The Odds Are Often Better Than Families Expect
A KFF analysis of CMS data found that Medicare Advantage insurers made roughly 53 million prior authorization determinations in 2024, with about 4.1 million fully or partially denied. Only around 11.5% of those denials were formally appealed, but among the ones that were, roughly 81% were partially or fully overturned. The gap between how often appeals succeed and how rarely they’re filed is one of the more striking patterns in Medicare Advantage data, and it’s a big part of why this guide exists.
Building a Stronger Appeal
None of the following guarantees a particular outcome, but families often find these steps helpful when preparing a Level 1 appeal:
- Ask the treating doctor’s office for a short letter explaining, in clinical terms, why the specific service is medically necessary.
- Request a copy of the plan’s specific denial reason in writing if it wasn’t already clear, and address that reason directly in the appeal.
- Keep copies of everything, including the denial letter, dates, and the names of anyone spoken to by phone.
- Watch the filing deadline closely. A late appeal can require a separate explanation for why it’s late, and may not be accepted.
- Consider asking for an expedited appeal if waiting for a standard decision could seriously risk health or the ability to regain function.
If Denials Keep Happening
A single denial is often resolved through Level 1 or Level 2 of the appeals process above. But a pattern of repeated denials, especially for care a physician considers medically necessary, is one of the more common reasons families start weighing whether their current Medicare Advantage plan still fits. Senioridy’s guide on when Medicare Advantage isn’t enough walks through that broader decision, including the timing and Medigap considerations involved in switching back to Original Medicare.
Where to Get Free Help
Appealing a denial can feel like a lot to take on alongside an existing care situation. A State Health Insurance Assistance Program (SHIP) counselor offers free, unbiased help understanding a specific denial, the deadlines that apply, and how to put together an appeal, at no cost and with nothing to sell.
Whatever the outcome of an appeal, having the right care providers in place matters just as much as understanding the coverage. Search Senioridy’s in-home senior care directory to find providers who can support a family through recovery and beyond.
This article is for informational purposes only and does not constitute legal, financial, or medical advice. Medicare Advantage appeal rules, deadlines, and dollar thresholds are set by CMS and are subject to change, and Medicare Advantage coverage rules may differ from Original Medicare in some respects. For free, personalized guidance on a specific denial or appeal, contact your State Health Insurance Assistance Program (SHIP) counselor at shiphelp.org, available in every state at no cost. For appeals reaching a formal hearing or federal court, families may want to consult a licensed attorney. Always confirm current deadlines and requirements with your plan or Medicare directly.