Remittance advice remark code
Remark code N56 meaning
RARC N56: The procedure code is not correct or valid for the services billed or the date of service.
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- Remark code
- RARC N56
- Short name
- Code not right for the service or date
- Plain meaning
- The procedure code is not correct or valid for the services billed or the date of service.
- 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 code for the date of service and against the documentation.
Reason codes it often comes with
Related remark codes
Related pages
Questions
What does remark code N56 mean?
The procedure code is not correct or valid for the services billed or the date of service. This is Rivvi's plain-English summary of RARC N56. X12's exact wording is on x12.org.
What should I do about N56?
Check the code for the date of service and against the documentation.
Is N56 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 16, 181, 4.
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.