Viral and prion infections of the central nervous system (A80-A89)
A80Acute poliomyelitis
Excludes 1: acute flaccid myelitis (G04.82)
A80.0Acute paralytic poliomyelitis, vaccine-associated
A80.1Acute paralytic poliomyelitis, wild virus, imported
A80.2Acute paralytic poliomyelitis, wild virus, indigenous
A80.3Acute paralytic poliomyelitis, other and unspecified
A80.30Acute paralytic poliomyelitis, unspecified
A80.39Other acute paralytic poliomyelitis
A80.4Acute nonparalytic poliomyelitis
A80.9Acute poliomyelitis, unspecified
A81Atypical virus infections of central nervous system
Includes: diseases of the central nervous system caused by prions
Use Additional Code: code, if applicable, to identify:
› dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
› dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
› dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
› dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
› dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
› mild neurocognitive disorder due to known physiological condition (F06.7-)
A81.0Creutzfeldt-Jakob disease
A81.00Creutzfeldt-Jakob disease, unspecified
› Jakob-Creutzfeldt disease, unspecified
A81.01Variant Creutzfeldt-Jakob disease
› vCJD
A81.09Other Creutzfeldt-Jakob disease
› CJD
› Familial Creutzfeldt-Jakob disease
› Iatrogenic Creutzfeldt-Jakob disease
› Sporadic Creutzfeldt-Jakob disease
› Subacute spongiform encephalopathy (with dementia)
A81.1Subacute sclerosing panencephalitis
› Dawson's inclusion body encephalitis
› Van Bogaert's sclerosing leukoencephalopathy
A81.2Progressive multifocal leukoencephalopathy
› Multifocal leukoencephalopathy NOS
A81.8Other atypical virus infections of central nervous system
A81.81Kuru
A81.82Gerstmann-Sträussler-Scheinker syndrome
› GSS syndrome
A81.83Fatal familial insomnia
› FFI
A81.89Other atypical virus infections of central nervous system
A81.9Atypical virus infection of central nervous system, unspecified
› Prion diseases of the central nervous system NOS
A82Rabies
A82.0Sylvatic rabies
A82.1Urban rabies
A82.9Rabies, unspecified
A83Mosquito-borne viral encephalitis
Includes: mosquito-borne viral meningoencephalitis
Excludes 2: Venezuelan equine encephalitis (A92.2)
› West Nile fever (A92.3-)
› West Nile virus (A92.3-)
A83.0Japanese encephalitis
A83.1Western equine encephalitis
A83.2Eastern equine encephalitis
A83.3St Louis encephalitis
A83.4Australian encephalitis
› Kunjin virus disease
A83.5California encephalitis
› California meningoencephalitis
› La Crosse encephalitis
A83.6Rocio virus disease
A83.8Other mosquito-borne viral encephalitis
A83.9Mosquito-borne viral encephalitis, unspecified
A84Tick-borne viral encephalitis
Includes: tick-borne viral meningoencephalitis
A84.0Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]
A84.1Central European tick-borne encephalitis
A84.8Other tick-borne viral encephalitis
A84.81Powassan virus disease
A84.89Other tick-borne viral encephalitis
› Louping ill
Code First: , if applicable, transfusion related infection (T80.22-)
A84.9Tick-borne viral encephalitis, unspecified
A85Other viral encephalitis, not elsewhere classified
Includes: specified viral encephalomyelitis NEC
› specified viral meningoencephalitis NEC
Excludes 1: 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)
A85.0Enteroviral encephalitis
› Enteroviral encephalomyelitis
A85.1Adenoviral encephalitis
› Adenoviral meningoencephalitis
A85.2Arthropod-borne viral encephalitis, unspecified
Excludes 1: West nile virus with encephalitis (A92.31)
A85.8Other specified viral encephalitis
› Encephalitis lethargica
› Von Economo-Cruchet disease
A86Unspecified viral encephalitis
› Viral encephalomyelitis NOS
› Viral meningoencephalitis NOS
A87Viral meningitis
Excludes 1: meningitis due to herpesvirus [herpes simplex] (B00.3)
› meningitis due to herpesvirus [herpes simplex] (B00.3)
› meningitis due to measles virus (B05.1)
› meningitis due to mumps virus (B26.1)
› meningitis due to poliomyelitis virus (A80.-)
› meningitis due to zoster (B02.1)
A87.0Enteroviral meningitis
› Coxsackievirus meningitis
› Echovirus meningitis
A87.1Adenoviral meningitis
A87.2Lymphocytic choriomeningitis
› Lymphocytic meningoencephalitis
A87.8Other viral meningitis
A87.9Viral meningitis, unspecified
A88Other viral infections of central nervous system, not elsewhere classified
Excludes 1: viral encephalitis NOS (A86)
› viral meningitis NOS (A87.9)
A88.0Enteroviral exanthematous fever [Boston exanthem]
A88.1Epidemic vertigo
A88.8Other specified viral infections of central nervous system
A89Unspecified viral infection of central nervous system