INFLAMMATORY DISEASES OF THE CENTRAL NERVOUS SYSTEM (320-326)
323 Encephalitis, myelitis, and encephalomyelitis
Includes:
acute disseminated encephalomyelitis
meningoencephalitis, except bacterial
meningomyelitis, except bacterial
myelitis:
ascending
transverse
Excludes:
acute transverse myelitis NOS (341.20)
acute transverse myelitis in conditions classified elsewhere (341.21)
bacterial:
meningoencephalitis (320.0-320.9)
meningomyelitis (320.0-320.9)
idiopathic transverse myelitis (341.22)
323.0: Encephalitis, myelitis, and encephalomyelitis in viral diseases classified elsewhere
Code first underlying disease, as:
cat-scratch disease (078.3)
human immunodeficiency virus [HIV] disease (042)
infectious mononucleosis (075)
ornithosis (073.7)
323.1: Encephalitis, myelitis, and encephalomyelitis in rickettsial diseases classified elsewhere
Code first underlying disease (080-083.9)
323.2: Encephalitis, myelitis, and encephalomyelitis in protozoal diseases classified elsewhere
Code first underlying disease, as:
malaria (084.0-084.9)
trypanosomiasis (086.0-086.9)
323.4: Other encephalitis, myelitis, and encephalomyelitis due to other infections classified elsewhere
Code first underlying disease
323.5: Encephalitis, myelitis, and encephalomyelitis following immunization procedures
Use additional E code to identify vaccine
323.6: Postinfectious encephalitis, myelitis, and encephalomyelitis
Code first underlying disease
323.7: Toxic encephalitis, myelitis, and encephalomyelitis
Code first underlying cause, as:
carbon tetrachloride (982.1)
hydroxyquinoline derivatives (961.3)
lead (984.0-984.9)
mercury (985.0)
thallium (985.8)
323.8: Other causes of encephalitis, myelitis, and encephalomyelitis
323.9: Unspecified cause of encephalitis, myelitis, and encephalomyelitis

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