Current
G04 — Encephalitis, myelitis and encephalomyelitis
Part of Chapter 6: Diseases of the nervous system , block Inflammatory diseases of the central nervous system (G00-G09) .
Official Notes
Includes
acute ascending myelitis
Includes
meningoencephalitis
Includes
meningomyelitis
Excludes1
encephalopathy NOS ( G93.40 )
Excludes2
acute transverse myelitis ( G37.3 )
Excludes2
alcoholic encephalopathy ( G31.2 )
Excludes2
multiple sclerosis ( G35- )
Excludes2
myalgic encephalomyelitis ( G93.32 )
Excludes2
subacute necrotizing myelitis ( G37.4 )
Excludes2
toxic encephalitis ( G92.8 )
Excludes2
toxic encephalopathy ( G92.8 )
Child Codes
- G04.0 Acute disseminated encephalitis and encephalomyelitis (ADEM) Has subcodes
- G04.1 Tropical spastic paraplegia Billable
- G04.2 Bacterial meningoencephalitis and meningomyelitis, not elsewhere classified Billable
- G04.3 Acute necrotizing hemorrhagic encephalopathy Has subcodes
- G04.8 Other encephalitis, myelitis and encephalomyelitis Has subcodes
- G04.9 Encephalitis, myelitis and encephalomyelitis, unspecified Has subcodes
Referenced By
Official notes on these codes cite G04.
FY 2027 effective October 1, 2026 · CDC NCHS and CMS