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N100 Remark Code (Deactivated): PPS Code Corrected

N100 meant the payer corrected a Prospective Payment System (PPS) code on the claim during adjudication. X12 deactivated it without naming a replacement; N69 and N72 now describe PPS code changes by the claims system or by medical reviewers.

X12 deactivated RARCN100 on November 1, 2016. Payers should no longer use it on new remittances, but it can still appear on older ERAs, corrected claims, and appeals.

Code: N100 (RARC N100)
Status: Deactivated StoppedNovember 1, 2016 (in use since September 14, 2001).
Code set: Remittance Advice Remark Codes (RARC)
Group codes: CO (Contractual Obligation): Any payment difference from the corrected PPS code was a provider adjustment.
Official description: PPS (Prospect Payment System) code corrected during adjudication.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What N100 meant

Prospective payment systems pay a set amount based on a classification code. Remark N100 told the provider that the payer changed that code while processing the claim, so payment reflected the payer’s version rather than the one submitted. It did not say why or who made the change.

What replaced it

X12 did not name a successor. Two active remarks now give more context: N69 says the claims processing system changed the PPS code, and N72 says medical reviewers changed it because the records did not support the original. When the submitted HIPPS code is missing or invalid, payers use N471.

If you still see N100

It was active until fairly recently, so older claims may still show it. Compare the corrected code against your assessment data, grouper output, and documentation. If the change was wrong, request reconsideration with supporting records; if right, update your processes so future claims are coded correctly.

N69 (Alert: PPS (Prospective Payment System) code changed by claims processing system.): Alert: PPS code changed by the claims processing system.
N72 (PPS (Prospective Payment System) code changed by medical reviewers.): PPS code changed by medical reviewers; not supported by clinical records.
N471 (Missing/incomplete/invalid HIPPS Rate Code.): Missing, incomplete, or invalid HIPPS rate code.

N100 FAQ

What is a PPS code?

A code used to group a claim for payment under a prospective payment system, such as a HIPPS code for home health or skilled nursing, or a DRG for inpatient stays.

Should I accept a corrected PPS code?

Compare it with your assessment or coding. If the payer's correction is not supported, you can dispute it through the payer's reconsideration or appeal process.

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