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)
323.01: Encephalitis and encephalomyelitis in viral diseases classified elsewhere
Excludes:
encephalitis (in):
arthropod-borne viral (062.0-064)
herpes simplex (054.3)
mumps (072.2)
other viral diseases of central nervous system (049.8-049.9)
poliomyelitis (045.0-045.9)
rubella (056.01)
slow virus infections of central nervous system (046.0-046.9)
viral NOS (049.9)
West Nile (066.41)
323.02: Myelitis in viral diseases classified elsewhere
Excludes:
myelitis (in):
herpes simplex (054.74)
herpes zoster (053.14)
other viral diseases of central nervous system (049.8-049.9)
poliomyelitis (045.0-045.9)
rubella (056.01)

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