G04 is the ICD-10 code for Encephalitis, myelitis and encephalomyelitis. It is a three-character category divided into 5 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block G00–G09 (Inflammatory diseases of the central nervous system) in Chapter VI, Diseases of the nervous system.
- Code type
- Category (3 characters)
- Chapter
- VI · G00–G99
- Classification
- WHO ICD-10, 2019 version
What G04 includes
Conditions and terms that are coded here.
- acute ascending myelitis
- meningoencephalitis
- meningomyelitis
What G04 excludes
Conditions that look similar but belong under another code.
Subcodes of G04
G04 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DG04Hjerne- og rygmarvsbetændelse
G04Aivotulehdus, selkäydintulehdus tai aivo-selkäydintulehdus
G04Enzephalitis, Myelitis und Enzephalomyelitis
G04Encéphalite, myélite et encéphalomyélite
G04encefalitis, myelitis en encefalomyelitis
Listed through more specific codes:
- G04.30Acute necrotizing hemorrhagic encephalopathy, unspecified
- G04.31Postinfectious acute necrotizing hemorrhagic encephalopathy
- G04.32Postimmunization acute necrotizing hemorrhagic encephalopathy
- G04.39Other acute necrotizing hemorrhagic encephalopathy
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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