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N745 Remark Code: Missing Ambulance Report

N745 means the payer required an ambulance report, often called the patient care report or run sheet, to process this transport claim and did not receive one. The trip usually cannot be paid until the report is submitted.

Quick facts

Code
N745 (RARC N745)
Status
Active In use since March 1, 2015.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): The ambulance provider is responsible for the denied amount until the report is supplied. Do not bill the patient.
Official description
Missing Ambulance Report.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N745 means

Ambulance claims are often reviewed for medical necessity and level of service, and the crew’s trip documentation is the main evidence. N745 tells you the payer wanted that documentation and had none for this transport.

It commonly appears with CARC 252 or CARC 226, and sometimes CARC 50 when the payer denied necessity for lack of support. Payers may require the report on every claim of a certain type, such as non-emergency or specialty care transports, or request it after the claim is received.

Common causes

  • The payer requires records for this transport type, and the claim went out without them.
  • A records request was sent to an address the billing office does not monitor.
  • The electronic patient care report was not finalized or signed by the crew, so it was not exported.
  • Records were sent but not matched to the claim because identifiers were missing.

How to fix it

  1. Pull the completed, signed patient care report for the date and trip billed.
  2. Include any related documents the payer lists, such as a physician certification statement for a non-emergency transport.
  3. Put the claim number, patient name, and member ID on each page.
  4. Submit through the payer’s records or reconsideration process and confirm receipt.
  5. If the claim is past the reconsideration window, file an appeal with the report attached.

How to prevent it

Set your billing system to hold transport claims until the crew report is locked, and know which payers want records attached on the first submission. Routing all payer records requests to one owner keeps deadlines from being missed.

Codes that may appear with N745

  • CO-252 (An attachment/other documentation is required to adjudicate this claim/service.): Documentation is required to adjudicate; N745 identifies the ambulance report.
  • CO-226 (Information requested from the Billing/Rendering Provider was not provided or not provided timely or was insufficient/incomplete.): The payer asked the provider for the report and did not receive it.
  • CO-50 (These are non-covered services because this is not deemed a 'medical necessity' by the payer.): Without the report, the payer could not confirm the transport was medically necessary.
  • N746 (Incomplete/invalid Ambulance Report.): An ambulance report was received but was incomplete or invalid.
  • N53 (Missing/incomplete/invalid point of pick-up address.): The point of pick-up address is missing or invalid.
  • N756 (Missing/incomplete/invalid point of drop-off address.): The point of drop-off address is missing or invalid.

N745 FAQ

What is an ambulance report?

It is the crew's clinical record of the transport: the patient's condition, assessments, treatments given, pick-up and destination, times, and why ambulance transport was needed.

Is a physician certification statement the same thing?

No. A certification statement is a separate form some payers require for certain non-emergency transports. The ambulance report is the crew's documentation of the trip.

How do I respond to N745?

Send the signed report for the transport date through the payer's records channel, with the claim number, and request reprocessing.