CO-22Contractual ObligationCoordination of Benefits
CO-22 Denial Code: Care may be covered by another payer (COB)
This care may be covered by another payer per coordination of benefits.
Why CO-22 happens
- ●Patient has other primary coverage on file with the payer
- ●COB information outdated or not updated by the member
- ●Medicare/commercial primacy determined incorrectly
How to fix a CO-22 denial
- 1
Confirm primacy with the patient and both payers (MSP questionnaire if Medicare)
- 2
Bill the correct primary payer first
- 3
Have the patient update COB with their plan, then resubmit with the primary EOB
How to prevent it
Capture and verify all active coverages at every visit, not just annually.
Drowning in CO-22 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.