AGAR Guide
RARCN170ReferenceCurrentVerified Aug 15, 2026

RARC N170

AR Guide Workflow

Documentation Required

The payer requested medical records, orders, notes, certificates, or other documentation before it will process the claim.

Open denial workflow

AR Guide explanation

What it means

A new, revised, or renewed certificate of medical necessity is needed.

AR Guide knowledge

Common denial category

Documentation Required — The payer requested medical records, orders, notes, certificates, or other documentation before it will process the claim.

AR Guide knowledge

Common usage

  • DME and supply claims

About this guidance: Note

AR Guide knowledge is general reference content written by our team — it is not payer-specific policy and never replaces the payer’s documentation or your contract. Always confirm specifics with the payer.

Reference

Commonly paired CARCs

CARCs this remark commonly accompanies on the ERA/EOB, per the AR Guide pairing data.

  • CARC163Attachment/other documentation referenced on the claim was not received.
  • CARC252An attachment/other documentation is required to adjudicate this claim/service. At least one Remark Code must be provided (may be comprised of either the NCPDP Reject Reason Code, or Remittance Advice Remark Code that is not an ALERT).

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