When Medicare denies a claim — whether it's for a medical service, procedure, prescription drug, or piece of equipment — you have the right to challenge that decision. The Medicare appeals process gives you a structured path to push back, and the odds may be more in your favor than you think. Understanding how the system works can help you fight for the coverage you deserve.
Why Claims Get Denied
Before diving into the appeals process, it helps to understand common reasons Medicare denies claims:
- The service is considered not medically necessary based on the documentation provided
- The claim was submitted with incorrect coding or billing errors
- The service is explicitly not covered under Medicare
- Prior authorization was required but not obtained
- You received care from a non-participating provider
Many denials stem from paperwork issues rather than genuine coverage exclusions. That is precisely why appealing is often successful. If your denial involves a prior authorization requirement, correcting the authorization paperwork alone may resolve the issue.
The Five Levels of Medicare Appeals
Medicare has a five-level appeals process, and each level provides an opportunity to have your case reviewed by a different entity. You must generally start at Level 1 and work your way up if necessary.
Level 1: Redetermination
The first step is a redetermination, which is an internal review by the Medicare Administrative Contractor (MAC) that processed your original claim — or by your Medicare Advantage or Part D plan if the denial came from a private insurer.
- Deadline to file: 120 days from the date you receive the denial notice (called a Medicare Summary Notice or Explanation of Benefits)
- Decision timeline: The MAC must respond within 60 days for Part A and Part B claims; Medicare Advantage and Part D plans have shorter deadlines (typically 30 to 60 days depending on the type of request)
- How to file: Submit a written request along with any supporting documentation, such as a letter from your doctor explaining why the service is medically necessary
Level 2: Reconsideration
If the redetermination upholds the denial, you can request a reconsideration by a Qualified Independent Contractor (QIC) — an independent organization that was not involved in the original decision.
- Deadline to file: 180 days from the date of the Level 1 decision
- Decision timeline: Generally 60 days for Original Medicare claims
- Key advantage: This level brings in a fresh set of eyes. The QIC reviews everything from scratch, including any new evidence you submit
Level 3: Administrative Law Judge (ALJ) Hearing
If the reconsideration does not go your way, you can request a hearing before an Administrative Law Judge. This is a more formal proceeding, often conducted by phone or video conference.
- Deadline to file: 60 days from the date of the Level 2 decision
- Minimum amount in controversy: The disputed amount must meet a specific dollar threshold (this amount is adjusted annually)
- Decision timeline: The ALJ generally has 90 days to issue a decision
- What to expect: You can present your case, call witnesses, and submit additional evidence. Many beneficiaries see favorable outcomes at this level
Level 4: Medicare Appeals Council Review
If the ALJ rules against you, the next step is requesting a review by the Medicare Appeals Council, which is part of the Department of Health and Human Services.
- Deadline to file: 60 days from the ALJ decision
- Decision timeline: 90 days, though it can take longer
- Nature of the review: The Council may review the case on the existing record or request additional information. They can also decline to review the case, in which case the ALJ decision stands
Level 5: Federal District Court
The final level of appeal is filing a lawsuit in federal district court. This step is rare and typically involves significant dollar amounts.
- Deadline to file: 60 days from the Appeals Council decision
- Minimum amount in controversy: A higher dollar threshold applies at this level
- Considerations: This is a full judicial proceeding and may require legal representation. Most beneficiaries resolve their appeals well before reaching this stage
How to Write an Effective Appeal Letter
Your appeal letter is your chance to make a compelling case. A well-written letter can make the difference between a denial being upheld and having it overturned.
Here is what to include:
- Your personal information: Full name, Medicare number, date of birth, and contact details
- Claim details: The date of service, the provider's name, the specific service or item that was denied, and the claim number
- A clear statement that you are appealing the denial and which level of appeal you are requesting
- The reason you disagree with the denial, written in plain, specific language
- Supporting evidence: Attach relevant documents such as medical records, a letter of medical necessity from your doctor, test results, or clinical guidelines that support your case
- A summary of what you are asking for — whether it is full coverage of the denied service, partial reimbursement, or reconsideration of the medical necessity determination
Keep your tone professional and factual. Avoid emotional language and focus on the medical and factual basis for your appeal.
Success Rates Are Higher Than You Might Expect
Many beneficiaries assume that fighting a Medicare denial is a lost cause, but the data tells a different story. Studies and reports over the years have consistently shown that a significant percentage of Medicare appeals are decided in the beneficiary's favor, particularly at the ALJ hearing level. Some estimates put the success rate at Level 3 at well over 50%.
The takeaway is clear: if you believe a denial is wrong, it is worth your time to appeal. Many denials are reversed simply because additional documentation is provided or a coding error is corrected.
Getting Free Help from SHIP
You do not have to navigate the appeals process alone. Every state has a State Health Insurance Assistance Program (SHIP) that provides free, unbiased counseling to Medicare beneficiaries. SHIP counselors can:
- Help you understand your denial notice and determine whether an appeal is warranted
- Assist you in gathering supporting documentation
- Help you draft your appeal letter
- Walk you through each level of the process and keep track of deadlines
- Represent you or accompany you during ALJ hearings
To find your local SHIP office, you can visit the SHIP website, call 1-800-MEDICARE (1-800-633-4227), or contact your state's department of aging. SHIP counselors can also help you understand Medicare savings programs and other assistance that may reduce your overall costs.
Don't Let a Denial Be the Final Word
A Medicare denial is not the end of the road. The appeals process exists specifically to protect your rights, and it has a strong track record of reversing incorrect decisions. Whether the issue is a billing error, a missing document, or a legitimate disagreement about medical necessity, taking the time to appeal can pay off. Start at Level 1, be thorough with your documentation, and take advantage of free SHIP counseling to strengthen your case. If your denial involves a Medicare Advantage plan, the plan itself handles the first levels of review before an independent contractor steps in.