Back to Blog
Medicare

How to Overturn Medicare Claim Denials

How to Overturn Medicare Claim Denials

Key Points

  • Check the Deadlines: You have 120 days for Original Medicare appeals and 60 days for Medicare Advantage to file a Level 1 appeal.
  • Review the Notice: Identify the specific reason for denial by looking closely at your Medicare Summary Notice (MSN) or plan Explanation of Benefits (EOB).
  • Start With Your Doctor: Many denials are simple clerical errors; a corrected bill or a “Letter of Medical Necessity” can often fix the issue before a formal appeal.
  • Use Fast Appeals for Urgent Situations: If you are being discharged from a hospital or rehab facility too soon, contact your regional Quality Improvement Organization (QIO) immediately.

Understanding the Initial Shock

Getting a piece of mail from Medicare or your Medicare Advantage plan saying “Service Not Covered” can feel like a punch to the gut. When you or a loved one are already dealing with an illness or recovery, the last thing you want is a paperwork battle over your healthcare.

It is completely normal to feel overwhelmed, but here is the most important thing to remember: A denial is a starting point, not a final answer. Medicare has a built-in, multi-level appeals process designed to give patients a voice. Countless families have successfully overturned denials by following these structured steps. Take a deep breath, gather your documents, and let’s walk through how to fight back.

Step 1: Find Out Exactly Why It Was Denied

You can’t win a game if you don’t know the rules. Your first step is understanding why the claim was rejected.

  • For Original Medicare: Look at your Medicare Summary Notice (MSN), which arrives by mail every three months. At the bottom or back of the MSN, there will be a remarks section explaining the denial.
  • For Medicare Advantage (Part C) or Prescription Drug Plans (Part D): You will receive an Explanation of Benefits (EOB) or a specific “Notice of Denial of Medical Coverage.”

Common reasons for denial include:

  • The service wasn’t deemed “medically necessary.”
  • A coding error or a missing signature on the paperwork submitted by the provider.
  • The specific service isn’t covered under your plan’s standard benefits.
  • Lack of required prior authorization.

Step 2: Contact Your Doctor’s Office

Before diving into formal appeals, call the billing department of the doctor or facility that provided the care. Surprisingly, a large number of denials are due to simple clerical errors—an incorrect code, a misspelled name, or a missing document.

If the denial was due to “medical necessity,” ask your doctor to write a Letter of Medical Necessity. This letter should clearly explain why the service, test, or equipment is essential for treating your specific condition. Having your doctor in your corner is your strongest weapon in an appeal.

Step 3: File a Level 1 Appeal (Redetermination)

If the doctor’s office cannot simply resubmit the claim with corrections, it’s time to formally appeal.

Watch Your Deadlines: You have 120 days from the date on your MSN (Original Medicare) or 60 days from the date on your EOB (Medicare Advantage) to file this request.

To file a Level 1 Appeal for Original Medicare:

  • Fill out a “Medicare Redetermination Request Form” (Form CMS-20027). You can find this online or request a copy by mail.
  • Alternatively, you can circle the denied item on your MSN, write “I am requesting a redetermination” at the bottom, sign it, and mail it to the address listed on the notice.
  • Include a copy of your doctor’s Letter of Medical Necessity and any other supporting documents.

Step 4: Keep Climbing the Ladder (If Needed)

If your Level 1 appeal is denied, don’t give up. The Medicare appeals process has five levels:

  1. Redetermination by the Medicare Administrative Contractor (MAC).
  2. Reconsideration by a Qualified Independent Contractor (QIC) — must be filed within 180 days.
  3. Hearing before an Administrative Law Judge (ALJ) — must be filed within 60 days, and the amount in controversy must be at least $200 (as of 2026).
  4. Review by the Medicare Appeals Council.
  5. Judicial Review in Federal District Court — the amount in controversy must be at least $1,960 (as of 2026).

With each step, an independent reviewer looks at your case. The instructions and deadlines for the next level are always included in the denial letter from the previous step.

Urgent Situations: The “Fast Appeal” Process

Standard appeals can take weeks or months. But what if you are actively receiving care—like being in a hospital, a skilled nursing facility, or receiving home health care—and you are told that your Medicare coverage is ending before you feel ready to leave?

In these cases, you have the right to a fast (expedited) appeal. You must contact the Beneficiary and Family Centered Care Quality Improvement Organization (BFCC-QIO) by no later than noon of the calendar day following receipt of the termination notice. Your discharge notice will include the phone number for the BFCC-QIO in your state. While the BFCC-QIO reviews your case, you typically cannot be forced to leave the facility or be billed for the contested days.

You Don’t Have to Do This Alone

Fighting a denial requires patience, organization, and persistence. If the process becomes too overwhelming, remember that you don’t have to navigate it alone. State Health Insurance Assistance Programs (SHIP) offer free counseling, and Amma Advocates specialize in untangling these exact types of administrative knots—from gathering the right documentation to filing appeals on your behalf. Your job is to focus on health and healing; knowing your rights is the first step toward securing the care you deserve.

Disclaimer: This content is for educational purposes only and does not constitute medical or legal advice. Medicare rules can change; always verify coverage with 1-800-MEDICARE or your State Health Insurance Assistance Program (SHIP).