What CO-22 means
Per coordination-of-benefits rules, the payer believes another insurer is primary. Common when COB information is stale — easily resolved once the correct payer order is established.
Common causes
- Coordination-of-benefits info on file is out of date
- The payer billed was not actually primary
- Patient has new or secondary coverage not reflected
How to appeal CO-22
Confirm the correct payer order with the patient/payer, update COB, and submit with the primary payer's EOB attached so the secondary processes correctly.
Skip the manual work
Remitavo drafts a payer-specific CO-22appeal — citing the carrier's own policy — straight from your remittance file. Send a sample and we'll show you.
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