835 ERA Decoder
Combo Lookup
Enter the Group Code, CARC, and RARC exactly as they appear on your 835 remittance to get a plain-English explanation and resolution steps — not just the individual code definitions.
Example from your 835 ERA:
CAS*CO*16*150.00**N257*0.00~↑ Group↑ CARC↑ RARC
Practice Type
How to read a CAS segment on your 835
In an 835 Electronic Remittance Advice, each denial appears as a CAS* segment:
CAS*CO*16*150.00**N257*0.00~COGroup Code — who is responsible (CO = payer writes off)
16CARC — the primary reason for the adjustment
150.00Adjustment amount
N257RARC — supplemental explanation of the adjustment
Enter the Group Code, CARC, and RARC from your ERA above to get the combined interpretation.
CO
Contractual Obligation
PR
Patient Responsibility
OA
Other Adjustment
PI
Payer Initiated