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N770 Remark Code: Provider Adjustment Request Processed

N770 means the payer processed the adjustment request you submitted and changed the original claim based on the information received. The remittance shows the result of that adjustment, which may increase, decrease, or reverse the earlier payment.

Quick facts

Code
N770 (RARC N770)
Status
Active In use since March 1, 2016.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): Any contractual changes resulting from the adjustment stay with the provider.
  • PR (Patient Responsibility): If the adjustment changed patient cost-sharing, PR lines show the patient's new responsibility.
  • CR (Correction and Reversal): Correction and reversal lines show how the original payment was reversed before the adjusted claim was paid.
Official description
The adjustment request received from the provider has been processed. Your original claim has been adjusted based on the information received.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N770 means

When a provider asks a payer to change a processed claim, whether by a corrected claim, a reopening request, or a phone or portal adjustment, the payer eventually sends a new remittance. N770 identifies that remittance as the result of your request. The original claim was adjusted using the information you provided.

N770 can appear with a range of CARCs because the adjusted claim goes through normal processing again. CARC 129 and the usual contractual codes are common.

How to read an N770 remittance

  • Reversal lines often cancel the original payment, sometimes under group CR.
  • New lines show how the corrected claim processed.
  • The net amount is what matters for posting: the new payment minus the reversed one.

What to do

  1. Match the adjustment to the request you submitted, using the claim number and dates.
  2. Post the reversal and the new payment so the account nets correctly.
  3. Check whether patient responsibility changed. If the patient now owes less, a refund may be due; if more, bill the difference.
  4. Confirm the payer applied your requested change. If not, follow up with the payer.

How to prevent posting problems

Log every adjustment request with the claim, reason, and expected result, so N770 remittances can be matched quickly. Reviewing adjusted claims as a group in an ERA analysis helps confirm that corrections actually recovered the money you expected.

Codes that may appear with N770

  • CO-129 (Prior processing information appears incorrect.): Prior processing information appeared incorrect and was corrected.
  • CO-45 (Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement.): Standard contractual adjustments reapplied on the adjusted claim.
  • N377 (Payment based on a processed replacement claim.): Payment is based on a processed replacement claim.
  • N779 (Replacement/Void claims cannot be submitted until the original claim has finalized.): A replacement or void was submitted too early, before the original finalized.
  • N880 (Original claim closed due to changes in submitted data.): The original claim was closed and the adjustment processed under a new claim number.

N770 FAQ

Is N770 good or bad news?

Neither by itself. It confirms your request was processed. Compare the new payment with the original to see whether you gained, lost, or broke even.

Why do I see negative amounts with N770?

Payers often reverse the original payment and then post the adjusted claim. The reversal appears as negative amounts, and the net result is the difference.

What if the adjustment is still wrong?

Review what the payer changed. If it did not apply your requested correction, contact the payer or file a reconsideration with documentation.