CARC22ReferenceCurrentVerified Aug 15, 2026CARC 22
AR Guide Workflow
Coordination of Benefits
Another plan may be primary, the primary's payment was not applied correctly, or the claim belongs with a different payer under COB rules.
AR Guide explanation
What it means
This care may be covered by another payer under coordination of benefits.
AR Guide knowledge
Common denial category
Coordination of Benefits — Another plan may be primary, the primary's payment was not applied correctly, or the claim belongs with a different payer under COB rules.
AR Guide knowledge
Common causes
- Multiple insurance plans on file
- Primary payer not billed first
- COB information missing or stale
AR Guide knowledge
What AR should verify
- Confirm the patient's insurance order of benefits
- Check whether the other payer has been billed
- Verify COB information on file is current
AR Guide knowledge
Recommended action
- Bill the primary payer per COB order
- Update COB records if the coverage order has changed
About this guidance: Note
AR Guide knowledge is general reference content written by our team — it is not payer-specific policy and never replaces the payer’s documentation or your contract. Always confirm specifics with the payer.