G04Encephalitis, myelitis and encephalomyelitis
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use G04 directly
Use the most specific code supported by the record.
- Chapter VI
- Diseases of the nervous system
- Group G00-G09
- Inflammatory diseases of the central nervous system
- Official Vietnamese name
- Bệnh viêm não, viêm tủy và/hoặc viêm não - tủy
- Additional WHO coding guidance
- Incl.: acute ascending myelitis meningoencephalitis meningomyelitis Excl.: encephalopathy: NOS (G93.4) alcoholic (G31.2) toxic (G92) multiple sclerosis (G35) myalgic encephalomyelitis (G93.3) myelitis: acute transverse (G37.3) subacute necrotizing (G37.4)
Related G04 codes
G04.0
Primary diagnosis candidate
Acute disseminated encephalitis
G04.1
Primary diagnosis candidate
Human T-cell lymphotropic virus associated myelopathy
G04.2
Primary diagnosis candidate
Bacterial meningoencephaliti s and meningomyelitis, not elsewhere classified
G04.8
Primary diagnosis candidate
Other encephalitis, myelitis and encephalomyelitis
G04.9
Primary diagnosis candidate
Encephalitis, myelitis and encephalomyelitis, unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
