RARC N381: Refer to Contract for Payment Restrictions
TL;DR
The payer is directing you to your provider contract for details about payment restrictions or fee schedule terms that apply to this charge — typically an informational remark accompanying a contractual adjustment.
Disclaimer
This content is for informational purposes only and does not constitute professional billing advice. Always verify information against your payer contracts and current coding guidelines. Consult a certified billing specialist for specific claim issues.
What Does RARC N381 Mean?
RARC N381 is an informational remark code that points billing staff to the provider's contractual agreement with the payer for details about how the charge was processed. It most commonly appears alongside contractual adjustments where the allowed amount is less than the billed amount, and the difference reflects the negotiated rate in the provider's contract rather than a claim error or coverage issue.
Unlike denial codes that require corrective action, N381 is usually explanatory. It tells you that the payment (or adjustment) is based on terms in your contract — such as fee schedules, bundling provisions, multiple procedure reductions, or other payment methodologies that the payer applies per the agreement. The adjustment associated with N381 is typically a contractual write-off that cannot be billed to the patient.
However, N381 can also appear in situations where the contract terms are being applied in ways the billing team did not expect. If the payment seems lower than what the contract specifies, or if the restriction being applied does not match your understanding of the agreement, N381 is a signal to pull out the contract and verify the terms.
What to Do
Review the payment against your contract's fee schedule for the billed service. If the allowed amount matches the contracted rate, post the contractual adjustment and write off the difference — this is standard processing and no further action is needed. The write-off amount should not be billed to the patient if you are a participating provider.
If the payment does not align with your contract terms, gather the specific contract language and the remittance details, then contact your payer representative or the provider relations department. Provide the claim number, the expected allowed amount per your contract, and the actual payment. Some contracts have complex provisions (carve-outs, tiered rates, pay-for-performance adjustments) that may explain the discrepancy, so review the full contract before disputing.
Common Scenarios
A contracted provider receives payment at the negotiated rate, and the difference between billed and allowed amounts is marked as a contractual adjustment with N381
A claim is subject to a multiple procedure payment reduction under the contract, and N381 explains that the reduced amount is per the contractual terms
The payer applies a lesser-of provision from the contract — paying the lower of the billed charge or the fee schedule amount — and N381 accompanies the adjustment
A provider notices the payment is lower than expected for a specific service and uses N381 as the starting point to review whether the contract's fee schedule was applied correctly
Commonly Paired With
RARC N381 commonly appears alongside these CARC denial codes: