Denied Medicare Coverage? How to Appeal Step by Step

A Medicare denial can feel final, especially when it involves care you’ve already received or urgently need. It isn’t final. Every Medicare beneficiary has the right to appeal, and many denials are overturned when people challenge them correctly and on time.

1. Confirm What Was Denied—and Why

Start by reading the notice carefully. The appeal process and deadlines depend on the type of notice:

• Original Medicare (Parts A or B): Look at your Medicare Summary Notice (MSN), which arrives every 3 months. The back of the MSN explains how to appeal and the deadline (typically 120 days from the MSN date).
• Medicare Advantage (Part C) or Part D drug plans: Look for a denial or coverage determination notice from your plan. These explain the reason and give specific appeal deadlines, often shorter than Original Medicare’s.

Identify:

• The exact service, supply, or prescription that was denied.
• The stated reason (not medically necessary, not a covered benefit, out-of-network, too early to refill, etc.).

You will respond directly to that reason in your appeal.

2. Gather Medical Support and Records

Your appeal is stronger when it’s backed by your care team. Ask your doctor or prescriber for:

• A supporting letter or statement explaining:
  • Your diagnosis and symptoms.
  • Why the denied service or drug is medically necessary for you.
  • Why alternatives are not appropriate or have failed, if applicable.
• Relevant medical records, test results, and visit notes that show:
  • Previous treatments and outcomes.
  • Risks of not receiving the requested care.

Be sure your full name, Medicare number, and date of service are clearly noted on all documents.

3. File the First-Level Appeal Correctly

Original Medicare (Redetermination)

For services under Original Medicare:

• Circle the denied item(s) on your MSN.
• Write “Please review my claim. I am requesting a redetermination.”
• Attach your appeal letter and supporting medical documents.
• Mail it to the address for redeterminations listed on your MSN.
• Keep copies of everything and note the date you mailed it.

Medicare Advantage (Part C) and Part D (Drugs)

For denials from a plan:

• Call the member services number on your plan card and ask how to file a Level 1 appeal (for Part C) or redetermination (for Part D).
• Submit a written appeal if possible, even if the plan accepts phone appeals.
• For urgent situations, request an expedited appeal—your doctor can help certify that waiting the standard time could seriously harm your health.

4. Escalate if Your First Appeal Is Denied

Medicare appeals have multiple levels. If you lose at one level, the denial notice will tell you how to move to the next:

1. Redetermination by the Medicare Administrative Contractor or plan.
2. Reconsideration by an independent review entity.
3. Hearing before an Administrative Law Judge, if the amount at issue meets a set minimum.
4. Further review by the Medicare Appeals Council.
5. Limited right to go to federal court if the amount in dispute is high enough.

You must follow the deadlines for each level; missing one can end your appeal.

5. Practical Tips to Improve Your Chances

• Be specific and focused: Address the exact reason for denial in your own words.
• Use medical language from your doctor: “Medically necessary,” “standard of care,” and specific diagnoses help.
• Stay organized: Keep a simple file with notices, letters, dates, and notes from phone calls.
• Ask for help: State Health Insurance Assistance Programs (SHIPs) and patient advocates often provide free one-on-one guidance.

Appealing a Medicare denial is detailed but manageable when you break it into clear steps: understand the notice, collect medical support, file on time, and continue through the levels if needed. A denial is a starting point, not the end of the story.