Reason Code Groups
Group CARC / RARC reason codes for use by 835 posting rules and AI adjudication.
Group A
Client-defined allowable / routing group
CO45PR2OA23PI97CO253PR253
Created by Sarah Mitchell · Updated 2026-04-11
Group B
Large client-defined denial and adjustment group
CO16CO18CO29CO50CO96CO97CO109CO119CO151CO197PR1PR2PR3PR45OA18OA109PI204
Created by Sarah Mitchell · Updated 2026-04-14
Group C
Adjustment family for code 253
CO253PI253OA253PR253
Created by Michael Carter · Updated 2026-04-16
PaidToPatient
Patient responsibility group
PR100OA100CO100PI100PR1PR2PR3
Created by Michael Carter · Updated 2026-04-19