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N596 Remark Code: No Medical Authorization From Patient

N596 means the insurer's records show the injured party did not complete a Medical Authorization for this loss. This is the patient's signed permission for the insurer to obtain medical records and information; it is not a prior authorization for treatment.

Quick facts

Code
N596 (RARC N596)
Status
Active In use since July 15, 2013.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • OA (Other Adjustment): The claim is held until the patient signs the authorization. The provider did nothing wrong on the bill itself.
  • PR (Patient Responsibility): Some carriers show the amount as patient responsibility while the authorization is missing. Check state rules before billing the patient.
Official description
Records reflect the injured party did not complete a Medical Authorization for this loss.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N596 means

Injury insurers often need medical records from several providers to evaluate a claim, and they typically need the patient’s signed release to get them. N596 says that release is missing. The claim is waiting on the patient, not on a correction from you.

Despite the word “authorization,” N596 is not about treatment approval. Treatment approval problems use codes like CARC 197. N596 usually appears with CARC 227 or P6.

Common causes

  • The patient was never sent the insurer’s authorization form, or didn’t return it.
  • The form expired or covers only certain providers or dates.
  • The authorization is unsigned or incomplete.

What to do

  1. Ask the adjuster which form is needed and where it should be sent.
  2. Contact the patient and explain that their claim is on hold until they sign.
  3. Offer help, such as having the form available at the next visit.
  4. Follow up once it is filed and ask for reprocessing of held bills.
  5. Respond to records requests promptly once the authorization is in place.

How to prevent it

For accident and injury patients, include the insurer’s medical authorization in your intake packet alongside the assignment of benefits, and note which forms each carrier requires.

Codes that may appear with N596

  • CO-227 (Information requested from the patient/insured/responsible party was not provided or was insufficient/incomplete.): Information or documents required from the patient were not provided.
  • CO-P6 (Based on entitlement to benefits.): Denied based on entitlement to benefits.
  • N594 (Records reflect the injured party did not complete an Application for Benefits for this loss.): The injured party did not complete an Application for Benefits.
  • N595 (Records reflect the injured party did not complete an Assignment of Benefits for this loss.): The injured party did not complete an Assignment of Benefits.
  • CO-197 (Precertification/authorization/notification/pre-treatment absent.): A treatment prior authorization was absent, which is a different requirement.

N596 FAQ

Is this the same as prior authorization?

No. A medical authorization is a records release signed by the patient. Prior authorization is approval of treatment before it is given.

Can I send records without the patient's authorization?

Rules on disclosing records to auto and injury insurers vary by state and program. Check your privacy policies and applicable law before releasing records without a signed authorization.

What happens after the patient signs?

The insurer can request or accept records and continue processing. Ask whether held bills will be reprocessed automatically.