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N463 Remark Code: Missing Support Data for Claim

N463 means support data for the claim is missing. The payer needs additional information or documentation to back up the claim and did not receive it. The remark is general, so you usually need to confirm exactly what the payer wants.

Quick facts

Code
N463 (RARC N463)
Status
Active In use since July 1, 2008.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): The claim is held or denied until support is provided. The provider supplies it; the patient is not billed.
Official description
Missing support data for claim.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N463 means

Most documentation remarks name a specific item: a discharge summary, an invoice, a physician order. N463 does not. It says only that support data for the claim is missing. That makes the first step different: before you gather anything, find out what the payer means.

N463 commonly accompanies CARC 252 or CARC 16.

Finding out what the payer wants

  • Check your mail and portal for a request letter tied to the claim. It often lists the required items.
  • Read the payer’s policy for the service. Some services always require specific documentation.
  • Look at other remarks on the same claim line, which may name the item.
  • Call provider services with the claim number and ask for the specific documents.

Then act

  1. Gather exactly what was requested, signed and dated, for the right patient and date of service.
  2. Organize it with a cover sheet listing the claim number and each item enclosed.
  3. Submit through the payer’s attachment process, electronic where available, and keep proof of submission.
  4. Follow up to confirm the payer matched the documents to the claim.
  5. If a corrected claim is required to reference the attachment, submit it with resubmission code 7 and the original claim number.

How to prevent it

Keep a list of services and payers that routinely require support data, and attach it when the claim is first sent. Where the 837 lets you reference attachments, use it so the payer knows documentation is coming. For how remark codes narrow down a denial, see how CARC and RARC codes work.

Codes that may appear with N463

  • CO-252 (An attachment/other documentation is required to adjudicate this claim/service.): An attachment or other documentation is required.
  • CO-16 (Claim/service lacks information or has submission/billing error(s).): The claim lacks information needed for adjudication.
  • CO-226 (Information requested from the Billing/Rendering Provider was not provided or not provided timely or was insufficient/incomplete.): Information requested from the provider was not provided.
  • N464 (Incomplete/invalid support data for claim.): Support data was received but was incomplete or invalid.
  • N706 (Missing documentation.): Documentation is missing.
  • M127 (Missing patient medical record for this service.): The patient's medical record for the service is missing.

N463 FAQ

What is 'support data'?

Anything that backs up the claim: medical records, reports, invoices, certifications, or other data the payer's policy requires for this service.

Why doesn't the payer say exactly what it needs?

N463 is a general remark. Payers often send a separate request letter or list the requirement in their policy. If not, call and ask.

Should I just send the whole chart?

Usually not. Large, unfocused packets are hard to review. Send what the payer asked for, organized and labeled.