Medicare denials can be overturned, but you have to follow the steps in order and meet strict important date

When Medicare denies a claim, you have the right to challenge that decision. The appeal process has five levels, and most people can resolve their case at level one or two without hiring a lawyer. You must file your first appeal within 180 days of the denial letter, and each level has its own important date. The key is to act quickly, keep copies of everything, and understand which level of appeal matches your situation.

Medicare denials happen for specific reasons: the service was deemed not medically necessary, the provider was out of network, you hit your deductible or out-of-pocket limit, or the claim was submitted incorrectly. Your denial letter will state the reason. That reason determines what evidence you need to include in your appeal.

Key Takeaways

  • You have 180 days from the denial letter to file your first appeal, called a redetermination, with your Medicare carrier or plan.
  • A redetermination is reviewed by someone who did not make the original decision, and most denials are overturned or partially overturned at this stage.
  • If you disagree with the redetermination decision, you can request a reconsideration (level two) within 180 days, which goes to an independent review contractor.
  • Keep the original denial letter, your claim receipt, the provider's records, and any medical evidence that supports why the service was necessary.
  • If the amount in dispute is $200 or more, you can skip levels two and three and request an administrative law judge hearing at level four.

Level One: Redetermination — Your First Appeal

A redetermination is a request for Medicare to look at the claim again. You file it with the same organization that made the original decision: your Medicare Advantage plan if you have one, or your Medicare carrier (the private company that processes claims for Original Medicare in your state) if you have traditional Medicare.

To file a redetermination, contact your plan or carrier and ask for a redetermination request form, or submit a letter stating that you disagree with the denial and why. Include your claim number, the date of service, the provider's name, and a brief explanation of why you believe the service was medically necessary or why the denial was wrong. Attach copies of any supporting documents: your doctor's notes, test results, prescriptions, or a letter from your provider explaining the medical reason for the service.

Medicare has 60 days to review your redetermination and send you a written decision. Many denials are overturned at this stage because the reviewer may have access to additional medical records or may interpret the medical necessity standard differently than the original reviewer did.

Level Two: Reconsideration — If You Disagree With the Redetermination

If Medicare upholds the denial after your redetermination, you can request a reconsideration within 180 days of that decision. A reconsideration is reviewed by an independent review contractor (IRC), a company hired by Medicare that has no connection to the original decision.

File your reconsideration request with the same plan or carrier. Include the same documents you sent before, plus the redetermination decision letter. You can also add new evidence if you have it — for example, a more recent letter from your doctor or updated medical records that clarify why the service was necessary.

The IRC has 60 days to issue a decision. If the amount in dispute is $200 or more, you have the option to skip the IRC review and go straight to an administrative law judge hearing instead. This is called "escalating" your appeal, and it can be faster if you have strong evidence and want a hearing in front of a judge.

Level Three and Four: When to Involve a Lawyer or Representative

If the IRC upholds the denial, you can request a hearing before an administrative law judge (ALJ) at level four. If the amount in dispute is less than $200, you must go through level three (Appeals Council review) first. If it is $200 or more, you can request the ALJ hearing directly.

At the ALJ stage, you can represent yourself, but many people hire a Medicare appeal attorney or representative. Attorneys who handle Medicare appeals work on contingency, meaning they take a percentage of the money recovered (usually 25 percent) only if you win. You can find Medicare appeal attorneys through your state bar association or through organizations like the Patient Advocate Foundation.

An ALJ hearing is more formal than the earlier levels. You or your representative will present evidence and may testify. The ALJ will issue a written decision within 90 days. If you lose at the ALJ level, you can appeal to the Appeals Council (level five), but this is rare and usually requires new evidence or a legal error in the ALJ's decision.

What Documents You Need Before You Start

Gather these items before you file your first appeal. The denial letter itself is the most important — it tells you exactly why Medicare said no. You will also need your claim number (on the denial letter or your Explanation of Benefits), the date of service, the provider's name and contact information, and your Medicare number.

Request your complete medical record from the provider's office. Ask specifically for the notes from the date of service, any test results, imaging reports, or pathology reports related to the claim. If your doctor prescribed the service or referred you for it, ask for a copy of the prescription or referral. If the denial was based on medical necessity, a letter from your doctor explaining why the service was medically necessary for your condition is often the most persuasive evidence you can submit.

If you have insurance records showing that another insurer covered the same service, include those. If you paid out of pocket for the service and have a receipt, include that too. Keep everything in one folder and make copies before you send anything to Medicare.

Common Reasons Denials Are Overturned

Denials are often reversed because the original reviewer did not have complete medical information. If your doctor's notes were missing from the claim file, a redetermination reviewer who has access to those notes may overturn the denial. If the denial was based on a rule that does not actually explore to your situation — for example, if Medicare said a service requires prior authorization and you had it, but the claim file did not show it — the redetermination reviewer will correct that.

Denials are also overturned when the medical evidence supports the service but the original reviewer applied too strict a standard. For example, a physical therapy claim might be denied as "not medically necessary" when in fact your doctor's notes clearly document a medical condition that benefits from therapy. A second reviewer may weigh that evidence differently.

If the denial was a clerical error — wrong date, wrong provider code, wrong patient identifier — it will almost certainly be fixed at redetermination. Call your plan or carrier and ask what the specific reason for the denial was. If it sounds like an error, mention that in your appeal letter.

important date and What Happens If You Miss One

You have 180 days from the denial letter to file a redetermination. If you miss that important date, you lose the right to appeal that claim. The 180-day clock starts from the date on the denial letter, not the date you received it, so do not wait. If you receive a denial letter, file your appeal within 30 days to be safe.

Each subsequent level also has a 180-day important date from the previous decision. If you receive a redetermination decision and want to request a reconsideration, you have 180 days from that decision letter. If you miss a important date, you cannot appeal further.

If you are working with a representative or attorney, they will track these important date for you. If you are appealing on your own, write the important date on a calendar and set a reminder 30 days before it. Many people miss appeals because they assume they have more time than they do.

Frequently Asked Questions

Do I have to pay the bill while I am appealing?

No. While your appeal is pending, the provider cannot bill you or send your account to collections. However, if you lose the appeal, you will owe the bill. Some providers will ask you to sign an agreement saying you understand you may owe the money if the appeal is denied. It is safe to sign this — it does not waive your right to appeal.

Can I appeal a denial from my Medicare Advantage plan?

Yes. The process is the same: redetermination, then reconsideration with an independent review contractor, then ALJ hearing if needed. Medicare Advantage plans must follow the same appeal rules as Original Medicare. Your plan will tell you how to file, but you can also contact Medicare directly at 1-800-MEDICARE for help.

What if the provider says they will not help me appeal?

You do not need the provider's permission to appeal. You can file the appeal yourself using the denial letter and your own medical records. However, if the provider will help, ask them to submit their clinical notes and a letter of medical necessity to support your appeal. Many providers have staff who handle appeals and will do this at no cost to you.

How long does the whole appeal process take?

A redetermination takes up to 60 days. A reconsideration takes another 60 days. An ALJ hearing can take several months to schedule and decide. If you need the money quickly, ask your provider if they will accept a payment plan while you appeal, or ask if they have a financial information program.

What if I disagree with the appeal decision?

You can move to the next level. From redetermination, go to reconsideration. From reconsideration, go to ALJ hearing (or Appeals Council if the amount is under $200). Each level is a fresh review, and new evidence can be submitted at each stage. Keep appealing as long as you believe the decision is wrong and the amount in dispute justifies the time and effort.