Medicare Denied Claim as Not Medically Necessary
Does your notice say something like this?
"The information provided does not support the need for this service"
"Medicare does not consider this service medically necessary"
"This service is not reasonable and necessary"
If so, you're in the right place. Here's what it means and what to do.
What This Means
Medicare reviewed the information submitted with your claim and determined that the service or treatment wasn’t medically necessary for your condition. This doesn’t mean you didn’t need the care — it means Medicare didn’t receive enough evidence to support it based on what was submitted.
This is one of the most common reasons for Medicare denials, and it’s also one of the most successfully appealed.
Why This Happens
- The claim lacked supporting documentation. Your provider may not have included enough clinical information explaining why the service was needed for your specific condition.
- The service doesn’t match Medicare’s coverage criteria. Medicare has specific guidelines for when certain services are considered necessary. Your situation may not have matched their criteria based on what was submitted.
- Coding didn’t reflect the severity. The diagnosis codes on the claim may not have fully conveyed how serious your condition was.
- Automated review flagged the claim. Many claims are initially reviewed by computer systems that apply broad rules. A human reviewer may reach a different conclusion.
Should You Appeal?
Medical necessity denials have a strong track record on appeal. According to KFF (2024), approximately 80% of appealed Medicare Advantage medical necessity denials were overturned at the first level of appeal. Your chances improve significantly if your doctor provides a letter explaining why the service was needed.
That said, individual outcomes vary. The strength of your appeal depends on your specific medical situation and the documentation your doctor can provide.
What To Do Next
- Don’t panic — and don’t ignore it. You have time to appeal, but don’t miss your deadline (see below).
- Call your doctor’s office. Ask them if they can provide a letter of medical necessity or additional documentation supporting the service. Many providers are familiar with this process.
- Review your denial notice carefully. It should explain the specific reason Medicare found the service not medically necessary, and it will include instructions for how to appeal.
- File your appeal. For Original Medicare, you’ll submit a written request for redetermination to the Medicare Administrative Contractor listed on your MSN. For Medicare Advantage, follow the instructions on your denial notice.
- Keep copies of everything. Make copies of your denial notice, any letters from your doctor, and your appeal request before sending them.
Sources
- KFF: Medicare Advantage Prior Authorization and Denial Data, 2024
- Medicare.gov: Your Medicare Rights & Appeals
- CMS: Medicare Summary Notice
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Not sure which you have? Check the top of your denial notice. If it names a private insurance company (like Humana, UnitedHealthcare, or Aetna), you have Medicare Advantage. If it says "Centers for Medicare & Medicaid Services," you have Original Medicare.
Frequently Asked Questions
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This information is for educational purposes only and is not legal or medical advice. Always verify with your doctor's office and insurance company.