CO-A1Contractual ObligationDocumentation
CO-A1 Denial Code: Claim/service denied — see remark codes
Claim/service denied. At least one remark code must be provided — the RARC carries the actual reason.
Why CO-A1 happens
- ●Generic denial wrapper; the real reason is in the accompanying RARC
How to fix a CO-A1 denial
- 1
Read the remark code(s) on the remittance for the specific issue
- 2
Resolve per that reason and resubmit or appeal accordingly
How to prevent it
Train staff to always work the RARC, not just the CARC, on A1 denials.
Drowning in CO-A1 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.