A Denial Is Not the Final Word
Getting a coverage denial from Medicare is frustrating, but it's important to know it's the beginning of a process, not the end. Original Medicare has a formal, multi-level appeals system, and appeals succeed often enough that it's genuinely worth pursuing when you believe a service should have been covered. This is different from appealing a Medicare Advantage denial, which has its own process — this guide is for Original Medicare (Parts A and B).
Understanding your appeal rights turns a denial from a dead end into a next step. Here's how the process works and how to strengthen your case.
Where Denials Show Up
Under Original Medicare, you typically learn a claim was denied through your Medicare Summary Notice — the quarterly statement listing services and what Medicare paid or denied (see how to read your Medicare Summary Notice). It will show the denied item and a reason. Sometimes a provider tells you in advance that Medicare may not cover something, via an 'Advance Beneficiary Notice,' which preserves your right to appeal if you proceed and are denied.
The MSN is your starting document for an appeal — it contains the claim details and the deadline. Read it carefully rather than assuming a denial is correct; denials happen for fixable reasons like coding errors or missing documentation as often as for genuine coverage limits.
The Five Levels of Appeal
Original Medicare's appeals process has five escalating levels — you move to the next only if you disagree with the previous decision:
- Level 1 — Redetermination: request a review by the company that processes Medicare claims, within 120 days of your MSN
- Level 2 — Reconsideration: an independent review by a Qualified Independent Contractor
- Level 3 — a hearing before an Administrative Law Judge (for claims above a dollar threshold)
- Level 4 — review by the Medicare Appeals Council
- Level 5 — judicial review in federal district court
- Most successful appeals are resolved at the first or second level with the right documentation
How to Give Your Appeal the Best Shot
A few things improve your odds. Act within the deadline (120 days from the MSN for the first level). Get your doctor involved — a letter of medical necessity explaining why the service was needed, addressing the specific denial reason, is often the difference-maker. Include supporting documentation: medical records, the provider's notes, and anything that establishes the care was necessary. And keep copies of everything you submit and a record of dates and names.
Appeals can feel intimidating, but they're a genuine right, and legitimate claims are frequently overturned when properly documented. If you've received a denial you believe is wrong, don't just pay it or give up. We help clients understand and pursue Medicare appeals as part of the ongoing support we provide at no cost — and often, knowing the process and getting the right documentation from your doctor is all it takes to get a denial reversed.
Frequently Asked Questions
Can I appeal a Medicare denial?
Yes. Original Medicare has a five-level appeals process. You start with a 'redetermination' request within 120 days of the Medicare Summary Notice showing the denial, and can escalate through independent review, an administrative law judge hearing, and beyond if needed.
How long do I have to appeal a Medicare denial?
For the first level (redetermination), you generally have 120 days from the date of the Medicare Summary Notice showing the denial. Later levels have their own deadlines, so act promptly at each stage.
How do I improve my chances of winning a Medicare appeal?
Meet the deadlines, get a letter of medical necessity from your doctor addressing the specific denial reason, include supporting medical records, and keep copies of everything. Many denials are overturned when properly documented.
Is appealing an Original Medicare denial different from a Medicare Advantage appeal?
Yes. Original Medicare uses the five-level federal appeals process described here. Medicare Advantage plans have their own appeals process that starts with the plan itself, though it also escalates to independent review.
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