CO-136: Failure to Follow Prior Payer Rules
Failure to follow prior payer's coverage rules. The provider did not comply with the primary payer's coverage requirements, affecting the secondary payer's adjudication.
Why Claims Get Denied with CO-136
Denial code CO-136 is triggered when failure to follow prior payer's coverage rules. the provider did not comply with the primary payer's coverage requirements, affecting the secondary payer's adjudication. Understanding the root causes helps prevent future denials and strengthens your appeal when one occurs.
Secondary payer denied because the primary payer's rules were not followed
Required referral or authorization from primary payer was not obtained
Primary payer's network requirements not met before billing secondary
Coordination of benefits rules not properly followed
How to Appeal CO-136
Review the primary payer's requirements and determine what rule was not followed. If the primary payer's rules were actually followed, provide the primary payer's EOB and any authorization documentation. If not, obtain the required authorization or referral from the primary payer and resubmit.
Documentation Required for Appeal
A successful appeal of CO-136 requires thorough documentation. Gather these items before drafting your appeal letter:
Primary payer's EOB
Authorization or referral from primary payer
Documentation showing compliance with primary payer's rules
Secondary payer's specific denial rationale
How to Prevent CO-136 Denials
Ensure primary payer rules are followed before submitting to secondary payers. Include the primary payer's EOB with all secondary claims. Verify coordination of benefits requirements for each payer.
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