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.

Browse All Combinations

246 combos across 78 CARCs
CO

Contractual Obligation

PR

Patient Responsibility

OA

Other Adjustment

PI

Payer Initiated