Denial code · Last verified 2026-08-29
On a dental remittance, code CO 16 means: The claim is missing information or contains a submission or billing error; the remittance must carry a remark code saying what is missing. Not used for missing attachments. technical: fix and resubmit. This is not an appeal situation — correct the identified element and resubmit. Track the payer's timely-filing window while you fix it: a corrected claim must still land inside it.
Verdict
Not an appeal situation: correct the identified defect and resubmit as a corrected claim, inside the timely-filing window.
This is not an appeal situation — correct the identified element and resubmit. Track the payer's timely-filing window while you fix it: a corrected claim must still land inside it.
The classic fixable rejection: a missing tooth number, quadrant indicator, subscriber ID mismatch, or an omitted field on the ADA claim form. The paired remark code on the ERA tells you exactly which element failed.
