Medicare Claims, Denials and Appeals: What to Do Next
A denial is a decision—not necessarily the final answer. The right next step depends on who made the decision, what was denied and the deadline printed on your notice.
Start with the written notice
Keep the Medicare Summary Notice, Explanation of Benefits, denial letter or coverage-ending notice. It should identify the decision-maker, explain the reason and tell you where and when to request review. Do not assume that a provider bill, a pharmacy rejection or an Advance Beneficiary Notice is itself the final appealable decision.
Is care or medication needed urgently?
Do not wait for a routine callback if delay could threaten health or care is ending. Follow the fast-appeal directions on the notice immediately. Depending on the situation, that may mean contacting the Medicare Advantage or Part D plan, or calling the BFCC-QIO listed on a hospital or non-coverage notice.
A standard claim appeal and a fast appeal are not interchangeable. An appeal about a service already received can take longer; an expedited request is designed for situations where waiting could seriously jeopardize life, health or the ability to regain maximum function.
What kind of Medicare problem happened?
A claim appears denied on an MSN or EOB
Learn how Original Medicare’s Medicare Summary Notice differs from a plan’s Explanation of Benefits and which amounts are actually your responsibility.
A Medicare Advantage prior authorization was denied
Separate an incomplete request from an adverse organization determination, then coordinate records, resubmission or appeal with the treating provider.
A Part D drug was rejected or denied
Identify whether the issue is formulary status, prior authorization, step therapy, quantity limits, pharmacy processing or a true coverage denial.
You are unsure whether to appeal or file a grievance
An appeal challenges coverage or payment. A grievance addresses service, treatment, access or administrative quality.
A hospital or provider says covered care is ending
Hospital, skilled nursing, home health, rehabilitation and hospice notices can carry very short fast-appeal deadlines.
A plan changed how it covers a prescription
Review formulary changes, transition fills, alternatives and plan-specific restrictions before assuming the medication is permanently unavailable.
Six steps to take before filing
- Save every notice. Keep the envelope, denial notice, MSN, EOB, prior-authorization decision, pharmacy receipt and any provider messages.
- Write down the deadline. Use the date and instructions on the actual notice. Different Medicare appeal routes use different time limits.
- Identify who made the decision. It may be Original Medicare, a Medicare Advantage plan, a Part D plan, a provider or a pharmacy claim processor.
- Ask for the exact reason. A missing diagnosis code, absent record or network billing issue may require correction; a medical-necessity denial may require an appeal.
- Ask the clinician for support. Medical records and a concise statement explaining why the item, service or drug is medically necessary can materially strengthen the request.
- Keep proof of submission. Record names, dates, reference numbers and delivery confirmation. Keep a complete copy of everything sent.
The appeal route follows the coverage source
| Situation | Starting document or decision | Typical first review |
|---|---|---|
| Original Medicare Part A or Part B claim | Medicare Summary Notice | Redetermination by the Medicare Administrative Contractor listed on the MSN |
| Medicare Advantage coverage or payment | Plan denial or organization determination | Reconsideration requested from the Medicare Advantage plan |
| Medicare Part D drug coverage | Coverage determination or denial notice | Redetermination requested from the drug plan |
| Hospital discharge or covered care ending | Important Message from Medicare or Notice of Medicare Non-Coverage | Fast review by the BFCC-QIO named on the notice |
| Service or quality complaint | Complaint details and plan/provider records | Grievance or complaint process rather than a coverage appeal |
If you have Medicare Advantage, the plan—not Original Medicare—usually makes the initial decision about plan-covered medical services. If the issue concerns outpatient prescriptions, start with the rules of your Part D coverage.
What makes an appeal easier to review?
A useful appeal does more than say, “I disagree.” It ties the facts to the decision being challenged. Depending on the case, include:
- The denial notice and the exact item, service, drug or date of service.
- A short timeline of what happened and why the decision appears incorrect.
- Relevant medical records, prior treatments and failed alternatives.
- A treating clinician’s explanation of medical necessity.
- Plan Evidence of Coverage, formulary or coverage-policy language that supports the request.
- Receipts and proof of payment when reimbursement is involved.
Corrected claim or formal appeal?
If the provider agrees that the claim was submitted incorrectly, a corrected claim may be faster than an appeal. But do not let the appeal deadline expire while everyone assumes someone else is fixing the billing.
Where a Medicare broker can help—and where the broker cannot decide
A broker may help you locate plan documents, understand terminology, identify the appropriate department and organize questions for the plan or provider. That year-round support is one reason to choose a Medicare broker who remains available after enrollment.
The broker does not control the plan’s coverage decision, replace your clinician, act as the BFCC-QIO or provide legal representation merely by helping you understand the process. Some cases require the beneficiary, prescriber, authorized representative or attorney to act directly.
Medicare denial and appeal FAQs
Does a denied Medicare claim mean I automatically owe the full charge?
No. Check the MSN, EOB and provider bill carefully. The notice may show that the provider must correct the claim, that an amount is not billable to you or that additional review is available. Confirm the actual patient-responsibility amount before paying.
Can my doctor appeal a Medicare Advantage denial for me?
For a service you have not yet received, your doctor may request reconsideration on your behalf and must notify you. A doctor’s medical records and supporting explanation can also strengthen an appeal. Follow the plan’s denial notice for representation and submission requirements.
How many levels of Medicare appeal are there?
Original Medicare, Medicare Advantage and Part D generally have five appeal levels. The names, deadlines, decision timeframes and automatic-forwarding rules differ by coverage type, so use the instructions in each decision notice.
What if I missed the deadline printed on the denial?
Submit the request as soon as possible and explain why it is late. Medicare and plans may accept a late filing when good cause is shown, but acceptance is not automatic.
Is an Advance Beneficiary Notice an official Medicare denial?
No. An Advance Beneficiary Notice warns that Original Medicare may not pay. It is not itself Medicare’s final coverage decision. A claim generally must be submitted and denied before the ordinary claim appeal can begin.
Should I appeal or file a grievance?
Use an appeal to challenge a refusal to cover or pay, a cost-sharing decision or the ending of coverage. Use a grievance or complaint for service quality, treatment, delays, communication or other administrative concerns that are not primarily a coverage decision.
Can someone help me file the appeal?
Yes. You may appoint a representative, subject to Medicare or plan requirements. SHIP also provides free Medicare counseling, and 1-800-MEDICARE can help identify the correct process.
What should I do if care is ending tomorrow?
Read the coverage-ending notice and call the BFCC-QIO or plan contact listed on it immediately. Fast-appeal deadlines can be as early as the scheduled discharge day or noon the day before other services end.
Official sources
Need help identifying the next step?
Thompson Medicare Brokerage provides year-round help understanding Medicare Advantage and Part D plan documents in Missouri and Illinois. Urgent deadlines should always be handled directly through the contact listed on the notice.