Remittance advice remark code
Remark code N640 meaning
RARC N640: The service exceeds the number or frequency allowed in the time period.
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- Remark code
- RARC N640
- Short name
- Over the allowed number or frequency
- Plain meaning
- The service exceeds the number or frequency allowed in the time period.
- Kind
- Adds detail to the reason code on the same line.
Plain-English summary written by Rivvi. X12 owns the RARC list and its exact wording, which is not reproduced here. Read it on the X12 RARC list (list dated July 1, 2026, checked October 23, 2026). This page does not decide how a claim is paid.
What to check before resubmitting
- Check the payer's frequency limit for the code.
- Document medical need if the service had to be repeated.
Reason codes it often comes with
Related remark codes
Related pages
Questions
What does remark code N640 mean?
The service exceeds the number or frequency allowed in the time period. This is Rivvi's plain-English summary of RARC N640. X12's exact wording is on x12.org.
What should I do about N640?
Check the payer's frequency limit for the code. Document medical need if the service had to be repeated.
Is N640 a denial?
A remark code adds detail to the reason code on the same line. The reason code (CARC) and its group code decide what was denied or adjusted. It is often paired with reason codes 151, 119.
What is the difference between a RARC and a CARC?
A remittance advice remark code (RARC) adds detail to a claim adjustment reason code (CARC). The CARC says why the line was adjusted. The RARC often says what to fix.