ICD-10-CM > G00-G99 > G00-G09 > G04 G04 Encephalitis, myelitis and encephalomyelitis Non-Billable/Non-Specific Includes acute ascending myelitismeningoencephalitismeningomyelitis Type 1 Excludes encephalopathy NOS (G93.40) Type 2 Excludes 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) Codes G04.0Acute disseminated encephalitis and encephalomyelitis (ADEM)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 encephalopathyG04.30Acute necrotizing hemorrhagic encephalopathy, unspecifiedG04.31Postinfectious acute necrotizing hemorrhagic encephalopathyG04.32Postimmunization acute necrotizing hemorrhagic encephalopathyG04.39Other acute necrotizing hemorrhagic encephalopathyG04.8Other encephalitis, myelitis and encephalomyelitisG04.81Other encephalitis and encephalomyelitisG04.82Acute flaccid myelitisG04.89Other myelitisG04.9Encephalitis, myelitis and encephalomyelitis, unspecifiedG04.90Encephalitis and encephalomyelitis, unspecifiedG04.91Myelitis, unspecified
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