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N583 Remark Code: Patient Not in Insured Vehicle

N583 means the auto insurer denied the claim because the patient was not an occupant of its insured vehicle, so it does not consider the patient an eligible injured person under the policy. Another policy, such as the patient's own auto policy, may be responsible.

Quick facts

Code
N583 (RARC N583)
Status
Active In use since July 15, 2013.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • OA (Other Adjustment): This carrier is not liable. The balance should go to the correct auto policy or the patient's health insurance.
  • PR (Patient Responsibility): Some carriers report it as patient responsibility, but other coverage should be pursued before billing the patient.
Official description
Patient was not an occupant of our insured vehicle and therefore, is not an eligible injured person.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N583 means

Some auto medical coverages pay for people injured while riding in the insured vehicle. N583 says the insurer you billed has concluded the patient was not in that vehicle, for example because they were a pedestrian, in another car, or on a bicycle, so they fall outside the definition of an eligible injured person under that policy.

This is strictly an auto insurance remark. It usually comes with CARC P6 or P21.

Common causes

  • The wrong carrier was billed, such as the other driver’s insurer instead of the patient’s own.
  • The patient was a pedestrian or cyclist, and the policy’s medical coverage is limited to occupants.
  • The accident report lists the patient differently from what the registration staff recorded.

What to do

  1. Get the facts from the patient and the police report: which vehicle they were in, if any.
  2. Identify the right coverage. State priority rules decide which auto policy pays first for occupants, pedestrians, and household members.
  3. Bill the correct carrier with its claim number, or bill the patient’s health insurance if no auto medical coverage applies.
  4. Request reconsideration with evidence if the patient actually was an occupant.

How to prevent it

For every motor vehicle accident visit, ask whether the patient was a driver, passenger, pedestrian, or cyclist, and which vehicle they were in. Record the claim number for the correct policy before billing. For coordination issues, see coordination of benefits denials.

Codes that may appear with N583

  • CO-P6 (Based on entitlement to benefits.): Denied based on entitlement to benefits; the patient is not an eligible injured person.
  • CO-P21 (Payment denied based on the Medical Payments Coverage (MPC) and/or Personal Injury Protection (PIP)): Denied under PIP or medical payments rules.
  • CO-31 (Patient cannot be identified as our insured.): The patient cannot be identified as an insured under this policy.
  • N586 (The injured party does not qualify for benefits.): A broader statement that the injured party does not qualify for benefits.
  • N578 (Coverages do not apply to this loss.): None of the policy's coverages apply to the loss.
  • N577 (Personal Injury Protection (PIP)): Identifies Personal Injury Protection coverage.

N583 FAQ

Who covers a pedestrian or cyclist hit by a car?

It depends on state law and the policies involved. The patient's own auto policy, a household member's policy, the striking vehicle's policy, or health insurance may apply.

What if the patient was actually in the insured vehicle?

Send the police report or other evidence of occupancy to the adjuster and request reconsideration.

Does N583 apply to health plans?

No. It is an auto insurance code about vehicle occupancy.