Medicare Denied Claim for Late Filing (Timely Filing)
Does your notice say something like this?
"The time limit for filing has expired"
"This claim was not filed timely"
"The claim was received after the filing deadline"
If so, you're in the right place. Here's what it means and what to do.
What This Means
Medicare denied this claim because it was submitted after the filing deadline. For Original Medicare, providers generally have one calendar year from the date of service to submit the claim. Medicare Advantage plans may have shorter deadlines.
This is almost always a billing office issue, not something you caused.
Why This Happens
- The provider’s billing office missed the deadline. Claim submission is the provider’s responsibility. Staffing changes, system errors, or administrative backlogs can cause claims to be filed late.
- There was a delay in processing other insurance first. If you have other insurance in addition to Medicare, the primary insurer needs to process the claim first. Delays there can push the Medicare filing past the deadline.
- A claim was resubmitted after correction but too late. If an original claim was rejected for errors and the corrected version was resubmitted after the deadline, the timely filing limit may have passed.
- You changed insurance. If you recently switched from Medicare Advantage to Original Medicare (or vice versa), there can be confusion about which entity to bill and when.
Should You Appeal?
Timely filing deadlines are generally strict, and appeals rarely succeed unless you can demonstrate one of these narrow exceptions:
- The claim was actually filed on time (and you have proof, such as a submission receipt)
- An extraordinary event prevented timely filing (natural disaster, Medicare system outage)
- Medicare’s own error caused the delay
If none of these apply, the appeal is unlikely to succeed.
The more important question: should you owe money for this?
If your provider accepted assignment (agreed to Medicare’s payment terms) and they missed the filing deadline, they generally cannot bill you for the service. This is a protection for Medicare beneficiaries. Contact your provider’s billing office and ask whether they accepted assignment.
What To Do Next
- Contact your provider’s billing office. Tell them the claim was denied for timely filing. They may be able to resubmit with documentation showing it was originally filed on time, or they may need to write off the charge.
- Ask whether they accepted assignment. If they did, they should not bill you for their late filing.
- Check if you have other insurance. If another insurer caused the delay, your provider’s billing office may be able to request an exception from Medicare.
- If you’re being billed unfairly, contact 1-800-MEDICARE (1-800-633-4227) to report the issue, or contact your State Health Insurance Assistance Program (SHIP) for free help.
Sources
- CMS: Medicare Claims Processing Manual, Chapter 1, Section 70 — timely filing requirements
- Medicare.gov: Filing a Complaint About Your Medicare Coverage
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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.
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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.