G94 vs J09.X9
G94 (Other disorders of brain in diseases classified elsewhere) compared with J09.X9 (Influenza due to identified novel influenza A virus with other manifestations), 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 J09.X9: “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 | J09.X9Influenza due to identified novel influenza A virus with other manifestations | |
|---|---|---|
| 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 identified novel influenza A virus with other manifestations is a billable ICD-10-CM diagnosis code (J09.X9). |
| Includes | — | Influenza due to identified novel influenza A virus with encephalopathy Influenza due to identified novel influenza A virus with myocarditis Influenza due to identified novel influenza A virus with otitis media |
| Use additional code | — | code to identify manifestation 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