CARC 96 / CO-96: Non-Covered Charges in Medical Billing
November 03, 2026Learn what CARC 96 and CO-96 mean, how non-covered charges appear in an X12 835 ERA, and how to investigate coverage denials and patient responsibility.
CARC 97 / CO-97: Bundled Services and Included Payments
November 03, 2026Learn what CARC 97 and CO-97 mean, how bundled service adjustments appear in an X12 835 ERA, and how to investigate services included in another payment.
CARC 197 / CO-197: Prior Authorization Denials in Medical Billing
October 29, 2026Learn what CARC 197 and CO-197 mean, how prior authorization denials appear in an X12 835 ERA, and how to investigate authorization-related claim adjustments.
CARC 50 / CO-50: Medical Necessity Denials in Medical Billing
October 29, 2026Learn what CARC 50 and CO-50 mean, how medical necessity denials appear in an X12 835 ERA, and how to investigate documentation, coverage and appeals.
CARC 22 / CO-22: Coordination of Benefits Denials in Medical Billing
October 27, 2026Learn what CARC 22 and CO-22 mean, how coordination of benefits affects medical claims, how CARC 23 and OA-23 differ, and how to investigate COB denials.