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G04 Encephalitis, myelitis and encephalomyelitis

BackG04.0Acute disseminated encephalitis and encephalomyelitis (ADEM)3 →G04.00Acute disseminated encephalitis and encephalomyelitis, unspecifiedG04.01Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)G04.02Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitisG04.1Tropical spastic paraplegiaG04.2Bacterial meningoencephalitis and meningomyelitis, not elsewhere classifiedG04.3Acute necrotizing hemorrhagic encephalopathy4 →G04.30Acute necrotizing hemorrhagic encephalopathy, unspecifiedG04.31Postinfectious acute necrotizing hemorrhagic encephalopathyG04.32Postimmunization acute necrotizing hemorrhagic encephalopathyG04.39Other acute necrotizing hemorrhagic encephalopathyG04.8Other encephalitis, myelitis and encephalomyelitis3 →G04.81Other encephalitis and encephalomyelitisG04.82Acute flaccid myelitisG04.89Other myelitisG04.9Encephalitis, myelitis and encephalomyelitis, unspecified2 →G04.90Encephalitis and encephalomyelitis, unspecifiedG04.91Myelitis, unspecified
Category
G04
Encephalitis, myelitis and encephalomyelitis
INCLUDES
acute ascending myelitis
meningoencephalitis
meningomyelitis
EXCLUDES
Excludes1: encephalopathy NOS (G93.40)
Excludes2: 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)
Chapter
VI · Diseases of the nervous system
Section
G00-G09
Valid from
Source

CMS ICD-10-CM Tabular List, edition FY2026.

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