CO252 denial code description and corrective action

Missing document. An attachment is needed to process the claim.

This denial occurs when the insurance requires documentation to process the claim.
This denial mostly occurs when the insurance requires medical records to validate the services.

First, we need to verify the status of the claim. This can be done by checking the status through the insurance web portal or by calling the payer.
Mostly, there may be a remark code that specifies what information is required. If not, we should contact the insurance to confirm the exact reason for the denial. If it is found that the required document has already been submitted and received by insurance, then ask the representative to reprocess the claim. Be sure to record the claim number, representative’s name, and call reference number, and follow up on the claim after the provided turnaround time (TAT).
If the document has not yet been sent and we have it in our system, then we send it through mail or fax. Since most insurance portals now allow submission of records online, we can also use this feature to submit the documents.
If we do not have access to the document, then we contact the client to provide it so we can proceed further.
Also check the time limit for submitting the document, and if it has been exceeded, follow the practice’s SOPs. Some clients may still want us to submit the document even after the limit has passed, so we should proceed according to their instructions.