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N131 Remark Code: Payments Capped Across Multiple Contracts

N131 means the total payments made under more than one contract cannot exceed the allowance for the service. Because payment had already been made, or was being made, under another contract, this payment was reduced so the combined total stays within the single allowed amount.

Code: N131 (RARC N131)
Status: Active In use since October 31, 2002.
Code set: Remittance Advice Remark Codes (RARC)
Group codes: CO (Contractual Obligation): The reduction is contractual. The provider cannot bill the patient to recover amounts above the allowance.
OA (Other Adjustment): Some payers show the offset for payments under another contract as an other adjustment.
Official description: Total payments under multiple contracts cannot exceed the allowance for this service.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What N131 means

Sometimes a patient has more than one contract or coverage that could pay for the same service, whether through one payer or related plans. Each contract might calculate its own payment, but together they cannot pay more than the service’s allowed amount. N131 tells you this payment was cut back because of amounts paid under another contract.

N131 is a pricing explanation. It usually appears with CARC 45, or with a coordination-related reason when another payer’s contract is involved.

Common causes

The patient has two policies with the same carrier, and both processed the claim.
A service was paid under a base plan and a supplemental rider, and the payer capped the total.
A claim was processed under two contracts because of duplicate submissions to different payer IDs.
Coordination between related plans was not reflected in the order of benefits you billed.

What to do

Find every payment for the service, including from other contracts or payer IDs.
Compare the combined total with the allowed amount on the remittance.
If the total equals the allowance, post the adjustment; nothing more is owed.
If the total is below the allowance, or you never received the other payment, contact the payer with the claim numbers and ask for review.
Check the patient’s coverage order so future claims go to the right contract first.

How to prevent it

At registration, record every policy the patient holds and the order in which they pay. Submit to one contract at a time and wait for its payment before billing the next. The eligibility and COB guide explains how to keep coverage order accurate.

Codes that may appear with N131

CO-45 (Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement.): The charge exceeds the allowed amount; N131 explains that the allowance was shared across contracts.
OA-23 (The impact of prior payer(s) adjudication including payments and/or adjustments. (Use only with Group Code OA)): The impact of prior payer adjudication, when the other contract belongs to another payer.
CO-B13 (Previously paid.): The service may already have been paid, in whole or in part, on another claim.

MA17 (We are the primary payer and have paid at the primary rate.): The payer paid as primary and asks you to refund any excess the other insurer paid.
N347 (Your claim for a referred or purchased service cannot be paid because payment has already been made for this same service to another provider by a…): Denies a referred or purchased service already paid to another provider.

N131 FAQ

What are 'multiple contracts' here?

Two or more agreements under which the same service could be paid, such as different product lines, policies, or coverages held by the patient with the same payer or its affiliates. Details depend on the payer.

Can I be paid the full allowance twice?

No. N131 exists to stop that. The combined payments are capped at one allowance for the service.

How do I check the math?

Add all payments received for the service across the contracts and compare the total with the allowed amount. If the total is below the allowance, ask the payer to review.

Important: read before using this information

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