Understanding Medical Claim Denial Code CO-15 | Allzone

Discover what denial code CO-15 means in medical billing, why claims get rejected due to missing, invalid, or mismatched prior authorisations, and how healthcare providers can prevent and resolve these denials. At Allzone Management Services, we explain when the code applies, the common root causes—such as expired authorisation numbers or incorrect provider details—and actionable steps to correct and appeal CO-15 denials. With a proactive revenue cycle management strategy, you can minimise revenue losses, boost clean-claim rates and streamline reimbursement. Whether you’re a physician practice, hospital, or billing department, learn the best practices for verifying authorisations, updating patient records and training your team to avoid costly delays. Let Allzone help you turn denials into recoveries and optimise your billing process.