G92.8 vs G93.4
G92.8 (Other toxic encephalopathy) compared with G93.4 (Other and unspecified encephalopathy), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. G93.4 carries an Excludes2 note covering G92.8: “toxic (metabolic) encephalopathy (G92.8)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| G92.8Other toxic encephalopathy | G93.4Other and unspecified encephalopathy | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | G00-G99 — Diseases of the Nervous System (G00-G99) |
| Definition | Other toxic encephalopathy is a billable ICD-10-CM diagnosis code (G92.8). | Other and unspecified encephalopathy is a non-billable ICD-10-CM category code (G93.4). |
| Includes | Toxic encephalitis Toxic metabolic encephalopathy | — |
| Use additional code | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) | — |
| Code first | poisoning due to drug or toxin, if applicable, (T36-T65 with fifth or sixth character 1-4) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources