CARCContractual Obligation
CARC 252: An attachment/other documentation is required to adjudicate this claim/service
Your insurer needs additional documents from the provider to process this claim.
What this means for your claim
Some claims require supporting documentation (medical records, operative reports, discharge summaries) before the insurer will pay. This code means the claim is on hold pending receipt of those documents.
What to do next
- 1
Ask your provider what documentation the insurer has requested.
- 2
Follow up to confirm the records were submitted within the insurer's deadline.
- 3
If documents were sent but not received, get proof of transmission (fax confirmation, portal receipt) and resubmit.
Have more codes on your EOB?
Upload your full Explanation of Benefits and our analyzer will identify every adjustment code, explain each one in plain English, and flag anything worth disputing.
Analyze My EOB Free →