G04.90 Encephalitis and encephalomyelitis, unspecified
Instructional Notes:
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G04.90
Description: Encephalitis and encephalomyelitis, unspecified
Inclusion Term:
- Ventriculitis (cerebral) NOS
↓
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G04.9
Description: Encephalitis, myelitis and encephalomyelitis, unspecified
↓
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G04
Description: Encephalitis, myelitis and encephalomyelitis
Exclude1:
- encephalopathy NOS (G93.40)
Exclude2:
- acute transverse myelitis (G37.3)
- alcoholic encephalopathy (G31.2)
- multiple sclerosis (G35)
- myalgic encephalomyelitis (G93.32)
- subacute necrotizing myelitis (G37.4)
- toxic encephalitis (G92.8)
- toxic encephalopathy (G92.8)
Include:
- acute ascending myelitis
- meningoencephalitis
- meningomyelitis
↓
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G00-G09
Description: Inflammatory diseases of the central nervous system (G00-G09)
↓
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G00-G99
Description: Diseases of the nervous system
Exclude2:
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)