CARC and RARC Denial Codes Explained
Reason codes explain why a payment changed, why a claim denied, or what follow-up is needed.
Direct answer: CARC codes explain why a payer adjusted a claim payment. RARC codes add remark details that help billing teams understand what happened and what may need follow-up.
What CARC means
CARC stands for Claim Adjustment Reason Code. In an 835 ERA file, CARC values explain the reason a billed amount differs from the paid amount. Examples include contractual adjustments, missing information, prior authorization issues, or patient responsibility.
What RARC means
RARC stands for Remittance Advice Remark Code. RARC values provide additional context about the adjustment or denial. They often explain what documentation, authorization, or billing correction may be needed.
Why dashboards help
Raw ERA files can contain many reason codes across many claims. A denial management software workflow helps billing staff group codes by payer, amount, date of service, patient, provider, or follow-up status.
- Find top denial codes by payer
- Review underpaid procedures
- Track recurring reason-code trends
- Assign follow-up or appeal work
- Export audit-ready denial reports
Turn codes into follow-up work
One Care Portal ERA Dashboard helps organize CARC/RARC reason codes from 835 ERA files so billing teams can review denials and underpayments faster.
View ERA Dashboard