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N744 Remark Code: May Be an Auto or Other Accident

N744 means the payer adjusted the claim because the services may be related to an auto or other accident. The payer wants to know whether another insurer, such as auto or liability coverage, should pay first.

Code: N744 (RARC N744)
Status: Active In use since March 1, 2015; last modified March 1, 2017.
Code set: Remittance Advice Remark Codes (RARC)
Group codes: CO (Contractual Obligation): The payer holds payment until the accident question is resolved. It is not a patient balance.
OA (Other Adjustment): Some payers use OA to show another insurer may be primary.
Official description: Adjusted because the services may be related to an auto/other accident.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What N744 means

N744 is a coordination question. The payer sees signs that the treatment may relate to an auto accident or another accident where a different insurer might be primary. Rather than pay and later recover the money, it adjusts the claim and waits for the facts.

It is a suspicion, not a finding. The payer does not yet know of an insurer with confirmed responsibility; if it did, you would more likely see N725 or N727. N744 typically pairs with CARC 20, 21, or 22.

Common causes

Box 10b (auto accident) or 10c (other accident) on the CMS-1500 was marked yes.
Injury diagnoses or external cause codes suggest an accident.
The patient has not answered the payer’s accident questionnaire.
An earlier claim for the same injury was billed to an auto insurer.

How to fix it

Ask the patient how the injury occurred and whether any auto, liability, or medical payments coverage is involved.
If there was no accident, or no other coverage applies, correct boxes 10b and 10c if needed, send a corrected claim with resubmission code 7, and have the patient update the payer.
If auto or liability coverage applies, bill that insurer first.
When the other insurer pays partially, denies, or benefits are exhausted, send its explanation of benefits to the health plan for secondary processing.

How to prevent it

Capture accident details for every injury visit and keep the accident fields on the claim consistent with them. For more on payer order problems, see eligibility and COB denials.

Codes that may appear with N744

CO-20 (This injury/illness is covered by the liability carrier.): The injury may be covered by a liability carrier.
CO-21 (This injury/illness is the liability of the no-fault carrier.): The injury may be the liability of a no-fault carrier.
OA-22 (This care may be covered by another payer per coordination of benefits.): Another payer may be responsible under coordination of benefits.

N743 (Adjusted because the services may be related to an employment accident.): The same adjustment where the suspected accident is work related.
N727 (A no-fault insurer has reported having ongoing responsibility for medical services (ORM) for this diagnosis.): A no-fault insurer has reported ongoing responsibility, a confirmed rather than suspected accident.
N725 (A liability insurer has reported having ongoing responsibility for medical services (ORM) for this diagnosis.): A liability insurer has reported ongoing responsibility.
N305 (Missing/incomplete/invalid injury/accident date.): The accident date is missing or invalid.

N744 FAQ

What is an 'other accident' under N744?

Any non-work accident that could involve another insurer, such as a fall on someone else's property or a sports or recreational injury where liability coverage may apply.

The patient says there was no accident. What do I do?

Ask the patient to confirm this with the payer or complete its accident questionnaire, check that the claim's accident fields are correct, and request reprocessing.

Should I bill the auto insurer?

If the injury came from a motor vehicle accident, yes. Collect the auto carrier and claim number, and follow that state's no-fault or medical payments rules.

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