G94 vs J11.81
G94 (Other disorders of brain in diseases classified elsewhere) compared with J11.81 (Influenza due to unidentified influenza virus with encephalopathy), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. G94 carries an Excludes1 note covering J11.81: “encephalopathy in influenza (J09.X9, J10.81, J11.81)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| G94Other disorders of brain in diseases classified elsewhere | J11.81Influenza due to unidentified influenza virus with encephalopathy | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | J00-J99 — Diseases of the Respiratory System (J00-J99) |
| Definition | Other disorders of brain in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (G94). | Influenza due to unidentified influenza virus with encephalopathy is a billable ICD-10-CM diagnosis code (J11.81). |
| Includes | — | Influenzal encephalopathy NOS |
| Use additional code | — | code, if applicable, to identify resistance to antimicrobial drugs (Z16.-) |
| Code first | underlying disease | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources