Back to All Codes
252
CO - Contractual ObligationDocumentation
Denial Code CO-252: Additional Documentation Required
What Does Code 252 Mean?
An attachment/other documentation is required to adjudicate this claim/service. Additional clinical records or documentation must be submitted.
Group Code CO (Contractual Obligation): The provider has agreed to accept the payer's determination. The patient is generally not responsible for this amount.
Why Does This Happen?
The payer needs additional clinical information to make a coverage determination.
How to Resolve It
- 1Contact the payer to determine what documentation is needed
- 2Gather and submit the required records
- 3Resubmit the claim with the documentation attached
Want the full strategy?
The P2P Playbook covers payer-specific approaches for denial code CO-252 -- plus 15 denial objections with word-for-word responses, what reviewers are actually thinking, and the 60-second prep framework. Written by a medical director who reviewed cases for major payers.
Get The P2P Playbook -- $39