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N380 Remark Code: Original Processed, Send Corrected Claim

N380 means the original claim has already been processed, so the payer won't accept a new claim for the same services. To make changes, submit a corrected (replacement) claim that references the original claim.

Quick facts

Code
N380 (RARC N380)
Status
Active In use since April 1, 2007.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): The new submission was denied because it duplicates a processed claim. The provider must send a corrected claim instead; the patient is not billed.
  • OA (Other Adjustment): Some payers show the rejected duplicate as an other adjustment, since the original claim's result still stands.
Official description
The original claim has been processed, submit a corrected claim.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N380 means

Once a payer finishes processing a claim, that claim is the record for those services. If you later send a brand-new claim for the same patient, dates, and services, the payer sees a duplicate. N380 tells you the right way to make a change: send a corrected claim that points to the original.

It usually appears with CARC 18 (duplicate) or CARC B13 (previously paid).

Common causes

  • Staff fixed an error and rebilled the claim as original (frequency code 1) instead of corrected.
  • The original claim number was left off, so the payer couldn’t link the correction.
  • A line was added to a processed encounter by billing it on a new claim.
  • The clearinghouse stripped the frequency code or claim reference.

How to fix it

  1. Get the payer’s claim number for the original from the remittance.
  2. Rebuild the full claim with the corrections, including unchanged lines unless the payer says otherwise.
  3. Mark it as a replacement: resubmission code 7 and the original claim number in box 22, or frequency code 7 and the original reference in the 837.
  4. Submit and watch for the reversal and reprocessing of the original claim on the remittance.
  5. If you actually disagree with the payer’s decision rather than correcting data, file an appeal instead.

Our duplicate claims guide explains how payers decide what’s a duplicate.

How to prevent it

Add a rule in your billing system that requires a frequency code and original claim number whenever a claim is rebilled for a date already paid or denied. Train staff on the difference between a new claim, a corrected claim, and an appeal.

Codes that may appear with N380

  • OA-18 (Exact duplicate claim/service (Use only with Group Code OA except where state workers' compensation regulations requires CO)): Exact duplicate claim or service, which a new claim for already processed services resembles.
  • CO-B13 (Previously paid.): Previously paid; payment may have been made on the original claim.
  • N142 (The original claim was denied.): The reverse instruction: the original was denied, so send a new claim rather than a replacement.
  • N368 (You must appeal the determination of the previously adjudicated claim.): Says you must appeal the previously adjudicated claim, used when you disagree with a decision rather than correcting data.
  • N152 (Missing/incomplete/invalid replacement claim information.): Used when replacement claim information is missing or invalid.

N380 FAQ

How do I mark a claim as corrected?

On the CMS-1500, put resubmission code 7 and the original payer claim number in box 22. On the 837, use claim frequency code 7 and include the original claim reference.

Should the corrected claim include every line?

Usually yes. Most payers replace the entire original claim, so include all lines, not just the ones you changed.

What if I only want to add a charge?

Payers differ. Some want a corrected claim with all lines; others accept a new claim for a truly separate service. Check the payer's instructions.