ICD-10-CM code "G04": Encephalitis, myelitis and encephalomyelitis (2024)

Excludes

1. Diseases of the nervous system (G00-G99)

   Type 2certain conditions originating in the perinatal period (P04-P96)

   Type 2certain infectious and parasitic diseases (A00-B99)

   Type 2complications of pregnancy, childbirth and the puerperium (O00-O9A)

   Type 2congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)

   Type 2endocrine, nutritional and metabolic diseases (E00-E88)

   Type 2injury, poisoning and certain other consequences of external causes (S00-T88)

   Type 2neoplasms (C00-D49)

   Type 2symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

2. Inflammatory diseases of the central nervous system (G00-G09)
3. Encephalitis, myelitis and encephalomyelitis (G04)

   Type 1encephalopathy NOS (G93.40)

   Type 2acute transverse myelitis (G37.3)

   Type 2alcoholic encephalopathy (G31.2)

   Type 2multiple sclerosis (G35)

   Type 2myalgic encephalomyelitis (G93.32)

   Type 2subacute necrotizing myelitis (G37.4)

   Type 2toxic encephalitis (G92.8)

   Type 2toxic encephalopathy (G92.8)

Includes

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

   Includesacute ascending myelitis

   Includesmeningoencephalitis

   Includesmeningomyelitis

Subcategories

• Acute disseminated encephalitis and encephalomyelitis (ADEM) (G04.0)
• Tropical spastic paraplegia (G04.1)
• Bacterial meningoencephalitis and meningomyelitis, not elsewhere classified (G04.2)
• Acute necrotizing hemorrhagic encephalopathy (G04.3)
• Other encephalitis, myelitis and encephalomyelitis (G04.8)
• Encephalitis, myelitis and encephalomyelitis, unspecified (G04.9)