CO-16 Denial Code: Official Definition, Causes, Remark Codes and Step-by-Step Resolution [2026]
What Is the CO-16 Denial Code — Official X12 Definition Official Definition — CARC 16 (X12, Last Reviewed March 1, 2026): “Claim/service lacks information or has submission/billing error(s) which is needed for adjudication.” X12 Usage Rules: The CO-16 denial code is CARC number 16 on the official X12 Claim Adjustment…
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