Attachment/other documentation referenced on the claim was not received in a timely fashion.
Group code
CO or PI
Category
Documentation
Risk level
High
Appealable
Yes
Common RARC pairings
RARCs (Remittance Advice Remark Codes) provide the specific reason detail alongside CARC 164 on the 835 electronic remittance. These are the RARCs seen most often with this CARC.
| RARC | Meaning |
|---|---|
| N42 | Missing mental health assessment. |
| N764 | Missing/incomplete/invalid Hematocrit (HCT) value. |
| N796 | Missing/incomplete/invalid Hemoglobin (Hb or Hgb) value. |
| N850 | Missing/incomplete/invalid narrative explaining/describing this service/treatment. |
See the full resolution workflow for CARC 164
Members of the EDI-Code Intelligence Lab get the step-by-step rework path, appeal language, root-cause drivers, and prevention checklist for every CARC and RARC pairing, plus payer-specific requirements.
Open in EDI Lab