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N536 Remark Code: Secondary Won't Cover, Keep Prior Balance

N536 means the secondary payer is not changing the prior payer's determination of patient responsibility, because it does not cover this service. The deductible, coinsurance, or co-payment the primary payer assigned remains the patient's to pay, and you may collect it.

Quick facts

Code
N536 (RARC N536)
Status
Active In use since July 1, 2010.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • PR (Patient Responsibility): The prior payer's patient responsibility remains with the patient. The remark confirms you may collect it.
  • OA (Other Adjustment): The secondary payer may report the prior payer's amounts as other adjustments while explaining that it adds nothing.
Official description
We are not changing the prior payer's determination of patient responsibility, which you may collect, as this service is not covered by us.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N536 means

After the primary payer processes a claim, the patient is often left with a deductible, coinsurance, or co-payment. The secondary payer usually covers some or all of that. N536 is the secondary saying it will not, because the service itself is not a covered benefit under its plan.

The remark adds a helpful clarification: the primary’s determination of what the patient owes stands, and you may collect it. That is unusual language on a remittance, and it tells billing staff they can move the balance to the patient.

When it appears

  • A secondary plan with narrower benefits than the primary, for example a supplemental plan that excludes certain services.
  • A secondary plan that excludes a service category the primary covers.
  • Coordination with a secondary that pays only for specific benefit types.

What to do

  1. Confirm the patient responsibility amount from the primary payer’s remittance.
  2. Transfer the balance to the patient according to your financial policy.
  3. Check for a tertiary payer if the patient has one, and bill it before the patient if its plan might cover the balance.
  4. Consider an appeal only if you have evidence the secondary plan covers the service.
  5. Note restrictions such as Medicaid or other program rules that limit what can be collected from certain patients.

How to prevent surprises

Verify secondary benefits for high-cost services before providing them, and tell patients when their secondary plan will not pick up the balance. Clear expectations make the eventual bill easier to collect.

Codes that may appear with N536

  • PR-204 (This service/equipment/drug is not covered under the patient's current benefit plan): The service is not covered under the patient's plan with this secondary payer.
  • OA-23 (The impact of prior payer(s) adjudication including payments and/or adjustments. (Use only with Group Code OA)): Reflects the impact of the prior payer's adjudication.
  • CO-96 (Non-covered charge(s).): Non-covered charge at the secondary level.
  • CO-276 (Services denied by the prior payer(s) are not covered by this payer.): Services denied by the prior payer are not covered by this payer.
  • PR-275 (Prior payer's (or payers') patient responsibility (deductible, coinsurance, co-payment) not covered. (Use only with Group Code PR)): The prior payer's patient responsibility is not covered by this payer.
  • N219 (Payment based on previous payer's allowed amount.): Payment based on the previous payer's allowed amount, when the secondary does pay.

N536 FAQ

Can I bill the patient after N536?

Yes, for the patient responsibility the primary payer assigned. The remark explicitly says you may collect it. Stay within any limits your contracts or program rules set.

Why doesn't the secondary cover it?

The service is excluded from the secondary plan's benefits, even though the primary covered it in part. Plans cover different services.

Should I appeal?

Only if you believe the secondary plan does cover the service. Otherwise, bill the patient for the primary's patient responsibility.