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N539 Remark Code: Appeal or Waiver Filed for You Denied

N539 is an alert that the payer processed an appeal or waiver request on the provider's behalf, and that request was denied. The original adverse decision stands unless you pursue any further review rights you have.

Quick facts

Code
N539 (RARC N539)
Status
Active In use since July 1, 2010.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): The underlying adjustment remains the provider's responsibility after the denied request, unless overturned on further review.
  • PR (Patient Responsibility): If the underlying amount was assigned to the patient, it stays with the patient; the denied waiver did not change it.
Official description
Alert: We processed appeals/waiver requests on your behalf and that request has been denied.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N539 means

Some payers automatically consider an appeal or a waiver when processing certain claims, rather than waiting for the provider to ask. N539 reports the result of that automatic review: the payer considered it for you, and the answer was no.

The alert does not create a new denial. It confirms the existing one was reviewed and upheld, and it tells you the payer has already taken the step you might otherwise have taken yourself.

What to do

  1. Identify the original decision being upheld by reading the reason codes on the same line.
  2. Look for any letter explaining which appeal or waiver was considered and why it was denied.
  3. Check your remaining rights. Look for appeal-rights remarks such as N210 or MA01 and the payer’s policy on further levels of review.
  4. File a further appeal if you have new information or believe the review was wrong, within the applicable deadline.
  5. Otherwise, post the adjustment according to its group code.

Codes that may appear with N539

  • CO-193 (Original payment decision is being maintained.): The original payment decision is being maintained after review.
  • CO-29 (The time limit for filing has expired.): Timely filing, one area where payers may consider a waiver.
  • N210 (Alert: You may appeal this decision.): Alert that you may appeal the decision.
  • N211 (Alert: You may not appeal this decision.): Alert that you may not appeal the decision.
  • MA01 (Alert: If you do not agree with what we approved for these services, you may appeal our decision.): Medicare's appeal-rights alert explaining how to request review.

N539 FAQ

Can I still file my own appeal?

Possibly. Check the remittance for appeal rights messages and the payer's appeal policy. A request processed on your behalf does not automatically use up every level of review, but rules vary by payer.

What kind of waiver might a payer process?

Examples include waivers of liability, filing limit waivers, or similar exceptions. The remittance or accompanying letter should say which request was considered.

Why would a payer file a request on my behalf?

Some payers automatically review certain claims for waivers or exceptions during processing or reprocessing, so the provider does not have to ask.