Denial codes in medical billing are basically standard messages used to state the information to both patients and providers. These denial codes are generated by insurance companies using medical billing denial management software to ease the processes for medical providers.
The following is the list of denial codes in medical billing:
CO4 Denial Code: Inconsistency in the modifier used
CO11 Denial Code: Inconsistent diagnosis
CO16 Denial Code: Lacks Information
CO18 Denial Code: Duplicate Claims
CO22 Denial Code: Covered another payer for benefits