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N184 Remark Code: Split Technical and Professional Parts

N184 means the payer will not accept the service as a single global charge and wants the technical component and the professional component billed separately, typically using modifier TC for the technical part and modifier 26 for the interpretation.

Code: N184 (RARC N184)
Status: Active In use since February 28, 2003.
Code set: Remittance Advice Remark Codes (RARC)
Group codes: CO (Contractual Obligation): The global line was denied or adjusted because the components must be billed separately. Correct the billing; the patient should not be charged for it.
OA (Other Adjustment): Some payers report this as an other adjustment pending a correctly split claim.
Official description: Rebill technical and professional components separately.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What N184 means

Many diagnostic services, especially imaging and some tests, have two parts. The technical part is running the test; the professional part is interpreting it. When one provider does both in its own setting, the service can often be billed globally with no modifier. N184 says the payer will not take it that way here and wants two separate charges.

The remark usually sits with CARC 4 (procedure and modifier inconsistent) or CARC 16. It does not say you were not entitled to payment, only that the format of the bill was wrong.

Common causes

The service was performed in a hospital outpatient or inpatient setting, where the facility bills the technical part.
The practice’s contract with this payer requires split billing even in the office.
The practice leases or does not own the equipment, so the technical part belongs to someone else.
The billing system dropped the modifiers when creating the claim.

How to fix it

Confirm which components your practice actually performed and where the service was done.
If you did both parts and the setting allows it, rebuild the claim with one line carrying modifier TC and another carrying modifier 26 in box 24D.
If you did only the interpretation, bill only the line with modifier 26; the facility or equipment owner bills the technical side.
Submit a corrected claim with resubmission code 7 and the original claim number, unless the payer asks for a new claim.

How to prevent it

Set up place-of-service rules in your charge capture so diagnostic services in facility settings automatically carry modifier 26. Record payer-specific requirements for split billing, and review ownership or lease arrangements for equipment.

Codes that may appear with N184

CO-4 (The procedure code is inconsistent with the modifier used.): The procedure code is inconsistent with the modifier used, or a required modifier is missing.
CO-16 (Claim/service lacks information or has submission/billing error(s).): The claim has a billing error; N184 identifies the need to split components.
CO-97 (The benefit for this service is included in the payment/allowance for another service/procedure that has already been adjudicated.): Part of the service is included in another service already adjudicated, such as a facility's technical payment.

N195 (The technical component must be billed separately.): Specifically says the technical component must be billed separately.
N200 (The professional component must be billed separately.): Specifically says the professional component must be billed separately.
N13 (Payment based on professional/technical component modifier(s).): Payment based on professional or technical component modifiers.
M96 (The technical component of a service furnished to an inpatient may only be billed by that inpatient facility.): The technical component for an inpatient may only be billed by the facility.

N184 FAQ

What is the difference between the technical and professional components?

The technical component covers the equipment, supplies, and staff used to perform a test. The professional component covers the physician's interpretation and report. Some services can be billed globally when one provider does both.

Can I just add modifiers to the original line?

Usually you submit a corrected claim with two lines, one with modifier TC and one with modifier 26, if you performed both parts. If you performed only one, bill only that component.

Why would a payer refuse a global bill?

Common reasons include the service being done in a facility setting, the payer's contract requiring split billing, or the equipment being owned by another entity.

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