G04 ENCEPHALITIS, MYELITIS AND ENCEPHALOMYELITIS

Code Information

Diagnosis Code: G04

Short Description: Encephalitis, myelitis and encephalomyelitis

Long Description: Encephalitis, myelitis and encephalomyelitis

The code G04 is NOT VALID for claim submission

Code Classification:

Diseases of the nervous system (G00–G99)
- Inflammatory diseases of the central nervous system (G00-G09)
  - Encephalitis, myelitis and encephalomyelitis (G04)
    - G04 Encephalitis, myelitis and encephalomyelitis

Code Version: 2022 ICD-10-CM

The code G04 has the following ICD-10-CM references to the Index of Diseases and Injuries

Includes Notes:
- acute ascending myelitis
- meningoencephalitis
- meningomyelitis
Type 1 Excludes Notes:
- encephalopathy NOS (@G93.40*)
Type 2 Excludes Notes:
- acute transverse myelitis (@G37.3*)
- alcoholic encephalopathy (@G31.2*)
- multiple sclerosis (@G35*)
- myalgic encephalomyelitis (@G93.32*)
- subacute necrotizing myelitis (@G37.4*)
- toxic encephalitis (@G92.8*)
- toxic encephalopathy (@G92.8*)

ICD-10 Code	ICD-10 Description
G04.0	Acute disseminated encephalitis and encephalomyelitis (ADEM)
G04.00	Acute disseminated encephalitis and encephalomyelitis, unspecified
G04.01	Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)
G04.02	Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
G04.1	Tropical spastic paraplegia
G04.2	Bacterial meningoencephalitis and meningomyelitis, not elsewhere classified
G04.3	Acute necrotizing hemorrhagic encephalopathy
G04.30	Acute necrotizing hemorrhagic encephalopathy, unspecified
G04.31	Postinfectious acute necrotizing hemorrhagic encephalopathy
G04.32	Postimmunization acute necrotizing hemorrhagic encephalopathy
G04.39	Other acute necrotizing hemorrhagic encephalopathy
G04.8	Other encephalitis, myelitis and encephalomyelitis
G04.81	Other encephalitis and encephalomyelitis
G04.82	Acute flaccid myelitis
G04.89	Other myelitis
G04.9	Encephalitis, myelitis and encephalomyelitis, unspecified
G04.90	Encephalitis and encephalomyelitis, unspecified
G04.91	Myelitis, unspecified

This page was last updated on: 10/1/2023