Denial code · Other Adjustment (OA)
OA-18 denial code
The payer already has this exact claim or service line.
What the code means
Official meaning: Exact duplicate claim/service (Use only with Group Code OA except where state workers' compensation regulations requires CO)
In plain words: The payer already has this exact claim or service line.
The usual fix
Check if the claim was already sent and already paid or denied. Do not send the same claim again unless the payer asks for it.
This is general information, not advice on a specific claim.
Learn on the job
Learn on the job with real denied claims.
Working denied claims is the medical claims desk's daily work. Read a code, find what is missing, fix the claim, or write the appeal.