ICD-9-CM

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)

323.6 Postinfectious encephalitis, myelitis, and encephalomyelitis Code first underlying disease
323.61: Infectious acute disseminated encephalomyelitis (ADEM) Acute necrotizing hemorrhagic encephalopathy Excludes: noninfectious acute disseminated encephalomyelitis (323.81)
323.62: Other postinfectious encephalitis and encephalomyelitis Excludes: encephalitis: postchickenpox (052.0) postmeasles (055.0)
323.63: Postinfectious myelitis

323.6 Postinfectious encephalitis, myelitis, and encephalomyelitis

Code first underlying disease

Acute necrotizing hemorrhagic encephalopathy

Excludes:

noninfectious acute disseminated encephalomyelitis (323.81)

Excludes:

encephalitis:

postchickenpox (052.0)

postmeasles (055.0)

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