Getting a denial letter from Medicare is frustrating, especially when you believe the care you received or requested was completely necessary. The letter arrives, the language is dense, and the first instinct for many people is to assume the decision is final. It is not. Medicare has a formal appeals process that any beneficiary has the right to use, and thousands of people win those appeals every year without spending a single dollar on legal help. What it takes is knowing the steps, understanding the deadlines, and being willing to follow through.
Why Medicare Denials Happen
Medicare denies claims for several reasons that have nothing to do with whether the care was medically appropriate. Common reasons include missing documentation, a billing code error from the provider’s office, a determination that the service was not deemed medically necessary under Medicare’s guidelines, or a finding that the care was received outside of your covered network.
Understanding why your claim was denied is the first and most important step. Your denial letter, sometimes called a Medicare Summary Notice or an Explanation of Benefits, will state the specific reason. Read it carefully before doing anything else. The reason listed in that letter determines what evidence you need to gather for your appeal.
Step 1. Request a Redetermination
The first level of the Medicare denial appeal process is called a redetermination. This is a formal request asking Medicare to take a second look at the claim. You have 120 days from the date on your denial notice to file this request.
You submit a redetermination request by completing Form CMS-20027, which is available on the CMS website. You can also write a letter that includes your name, Medicare number, the specific item or service you are appealing, and the reason you believe the denial was wrong. Send it to the Medicare contractor listed on your denial notice.
Attach every piece of supporting documentation you have. This includes your doctor’s notes, test results, referral letters, and any written statement from your provider explaining why the service was medically necessary. More documentation is always better at this stage.
Medicare is required to respond to a redetermination request within 60 days. Many denials are reversed at this first level, particularly when the original denial was due to a documentation gap rather than a coverage dispute.
Step 2. Request a Reconsideration From a Qualified Independent Contractor
If your redetermination comes back as another denial, you move to the second level of appeal. This is called a reconsideration and it is reviewed by a Qualified Independent Contractor, or QIC, which is an organization that operates separately from Medicare and its contractors.
You have 180 days from the date of your redetermination decision to request a reconsideration. Use Form CMS-20033 or submit a written request with the same information required at level one. At this stage, include a letter from your treating physician that directly addresses the medical necessity of the denied service. A strong, specific letter from your doctor carries significant weight at the reconsideration level.
The QIC has 60 days to issue a decision. If the amount in dispute meets the threshold set for that year, you have the right to move forward if this level also results in a denial.
Step 3. Request a Hearing Before an Administrative Law Judge
The third level of appeal involves requesting a hearing before an Administrative Law Judge, or ALJ, through the Office of Medicare Hearings and Appeals. To reach this level, the amount in dispute must meet the minimum dollar threshold, which is adjusted annually. For 2026, check the current threshold on the OMHA website.
You have 60 days from the date of the QIC’s decision to request this hearing. You can request an in-person hearing, a video hearing, or have the ALJ decide based on the written record alone. Many people choose the written record option, which means you do not have to appear anywhere or speak in front of anyone.
Prepare a clear written statement that walks the ALJ through your case in plain language. Attach all prior denial notices, your redetermination and reconsideration decisions, your provider’s notes, and any clinical guidelines that support the medical necessity of your care. Organizations like the Medicare Rights Center offer free resources and counseling to help beneficiaries prepare for ALJ hearings without legal representation.
Step 4. Request a Review by the Medicare Appeals Council
If the ALJ rules against you, you have 60 days to request a review by the Medicare Appeals Council. This is a written review process and does not require a hearing. The Appeals Council looks at whether the ALJ applied Medicare rules correctly. Submit your request along with a clear explanation of what you believe the ALJ got wrong and why.
Step 5. Federal Court Review
The fifth and final level of appeal is filing a lawsuit in federal district court. This level requires the disputed amount to meet a higher dollar threshold and is the only level where having an attorney may genuinely help. That said, reaching federal court is rare. The majority of successful Medicare appeals are resolved at levels one through three.
Tips That Improve Your Odds at Every Level
Getting your doctor involved early makes a measurable difference. A letter that uses specific clinical language and ties the denied service directly to your diagnosis and treatment plan is far more persuasive than a general statement that care was needed.
Meet every deadline without exception. Missing a filing window can result in losing your right to appeal entirely. Write the deadline date on a calendar the same day your denial letter arrives.
Keep copies of everything you send and everything you receive. Create a folder for the appeal and add every document to it in chronological order. This makes each successive level easier to navigate because you already have the full record organized.
Your State Health Insurance Assistance Program, known as SHIP, provides free one-on-one counseling to Medicare beneficiaries. SHIP counselors are trained specifically to help people navigate the appeals process and can review your case at no cost. This is the closest thing to professional help you can get without hiring anyone.
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