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N85 Remark Code: Final Installment Payment

N85 is an informational alert that this is the final installment payment for the service. The payer has completed the series of payments, so no further installments should be expected.

Code: N85 (RARC N85)
Status: Active In use since January 1, 2000; last modified April 1, 2007.
Code set: Remittance Advice Remark Codes (RARC)
Group codes: CO (Contractual Obligation): Any remaining difference after the final installment is typically a contractual adjustment, if the total matches the contract.
PR (Patient Responsibility): Any remaining patient cost-sharing for the service should now be final and billable.
Official description: Alert: This is the final installment payment.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What N85 means

N85 closes out a payment series. When a payer pays a service in installments, it marks the last one with N85 so you know the series is complete. Like N84, it reports status rather than a decision.

Adjustments on the same line, such as CARC 45 or CARC 271, explain how the final amount was reached.

What to do

Total all installments for the service, using previous remittances that carried N84.
Compare with the expected allowed amount under your contract or fee schedule.
Resolve any shortfall by contacting the payer with your installment history before writing anything off.
Finalize patient responsibility and send a closing statement if cost-sharing remains.
Close the account once payer and patient balances are settled.

If the total paid over the series is regularly short, that may point to a payer setup or contract problem worth reviewing across accounts; see how to analyze CARC and RARC codes.

Codes that may appear with N85

CO-45 (Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement.): The total paid over all installments reflects the contracted or fee schedule amount.
OA-271 (Prior contractual reductions related to a current periodic payment as part of a contractual payment schedule when deferred amounts have been…): Prior contractual reductions related to a periodic payment schedule.

N84 (Alert: Further installment payments are forthcoming.): Alert that further installment payments are forthcoming.
M4 (Alert: This is the last monthly installment payment for this durable medical equipment.): Alert that this is the last monthly installment for durable medical equipment.
N134 (Alert: This represents your scheduled payment for this service.): Alert that this represents your scheduled payment for the service.

N85 FAQ

What should I check when the final installment arrives?

Add up every installment and compare the total with the allowed amount for the service. If there is a shortfall, contact the payer before writing it off.

Can the patient be billed now?

If the remittances show patient responsibility that has not been collected, the final installment is a good time to settle it, following your contract and the patient's plan.

What if treatment continues after the final installment?

Additional treatment may need a new authorization or claim. Ask the payer how continuing care should be billed.

Important: read before using this information

This page is general educational information about a standard industry code set. It is not medical billing, coding, legal, reimbursement, or compliance advice, and it does not create a professional or advisory relationship with ClaimsRevenue.

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