A85.8 Other specified viral encephalitis
Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.
Applicable to
- Encephalitis lethargica
- Von Economo-Cruchet disease
Applies from A85 Other viral encephalitis, not elsewhere classified
Includes
- specified viral encephalomyelitis NEC
- specified viral meningoencephalitis NEC
Excludes1 (never code together)
- encephalitis due to cytomegalovirus (B25.8)
- encephalitis due to herpesvirus NEC (B10.0-)
- encephalitis due to herpesvirus [herpes simplex] (B00.4)
- encephalitis due to measles virus (B05.0)
- encephalitis due to mumps virus (B26.2)
- encephalitis due to poliomyelitis virus (A80.-)
- encephalitis due to zoster (B02.0)
- lymphocytic choriomeningitis (A87.2)
- myalgic encephalomyelitis (G93.32)
MS-DRG index
Defines the logic of DRG(s) 097-099 in MDC 01.
Approximate ICD-9-CM (GEMs)
049.8 Other specified non-arthropod-borne viral diseases of central nervous system (approximate)
Diagnosis Index entries for A85.8
- Cruchet's disease
- Economo's disease
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › acute › inclusion body
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › lethargica (acute) (infectious)
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › Mengo
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › Rio Bravo
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › Vienna
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › viral, virus › specified type NEC
- Von Economo-Cruchet disease
Nearby codes
A85 Other viral encephalitis, not elsewhere classifiedA85.0 Enteroviral encephalitisA85.1 Adenoviral encephalitisA85.2 Arthropod-borne viral encephalitis, unspecifiedA85.8 Other specified viral encephalitis (this code)