1C8Z, 1C8Y, 1C8F, 1C8E.Z, 1C8E.Y, 1C8E.2, 1C8E.1, 1C8E, 1C8D, 1C8C, 1C8B, 1C8A, 1C89, 1C88, 1C87, 1C86, 1C85, 1C84, 1C83, 1C80, 1C81, 1C82

Viral Infections Of The Central Nervous System – ICD 10 & ICD 11

Definition of Viral infections of the central nervous system: Any disease of the central nervous system, caused by an infection with a viral source.

Coded Elsewhere:

  • Progressive multifocal leukoencephalopathy (8A45.02)
  • Enteroviral exanthematous fever (1F05.2)
  • Herpes simplex meningitis (1F00.20)
  • Subacute sclerosing panencephalitis (8A45.01)
  • West Nile virus infection (1D46)
  • Colorado tick fever (1D41)
  • Zoster meningitis (1E91.3)

ICD 11 Code For Viral infections of the central nervous system

1C80 Viral encephalitis not elsewhere classified

Coded Elsewhere:

  • Western equine encephalitis (1C83)
  • Eastern equine encephalitis (1C84)
  • Venezuelan equine encephalitis (1C8C)
  • Argentinian haemorrhagic fever (1D61.0)
  • Bolivian haemorrhagic fever (1D61.1)
  • Lassa fever (1D61.2)
  • La Crosse encephalitis (1C8D)
  • Oropouche virus disease (1D43)
  • Marburg disease (1D60.1)
  • Ebola disease (1D60.0)
  • Japanese encephalitis (1C85)
  • St Louis encephalitis (1C86)
  • Rocio viral encephalitis (1C87)
  • Murray Valley encephalitis (1C88)
  • Far Eastern tick-borne encephalitis (1C89)
  • Central European tick-borne encephalitis (1C8A)
  • Encephalitis due to herpes simplex virus (1F00.21)
  • Encephalitis due to mumps virus (1D80.3)
  • Varicella encephalitis (1E90.2)
  • Measles complicated by encephalitis (1F03.1)
  • Sequelae of viral encephalitis (1G84)
  • California encephalitis (1C8B)
  • Encephalitis due to Arenavirus (1D6Y)
  • Encephalitis due to Rubella virus (1F02.0)

ICD 10 Code For Viral infections of the central nervous system

(A80-A89) Viral infections of the central nervous system

Exclusions:

Sequelae of:

  • poliomyelitis (B91)
  • viral encephalitis (B94.1)

A80 Acute poliomyelitis

A80.0 Acute paralytic poliomyelitis vaccine-associated

A80.1 Acute paralytic poliomyelitis wild virus imported

A80.2 Acute paralytic poliomyelitis wild virus indigenous

A80.3 Acute paralytic poliomyelitis other and unspecified

A80.4 Acute nonparalytic poliomyelitis

A80.9 Acute poliomyelitis unspecified

A81 Atypical virus infections of central nervous system

Inclusions:

  • Prion diseases of the central nervous system

A81.0 Creutzfeldt-Jakob disease

A81.1 Subacute sclerosing panencephalitis

  • Dawson inclusion body encephalitisVan Bogaert sclerosing leukoencephalopathy

A81.2 Progressive multifocal leukoencephalopathy

  • Multifocal leukoencephalopathy NOS

A81.8 Other atypical virus infections of central nervous system

  • Kuru

A81.9 Atypical virus infection of central nervous system unspecified

  • Prion disease of central nervous system NOS

A82 Rabies

A82.0 Sylvatic rabies

A82.1 Urban rabies

A82.9 Rabies unspecified

A83 Mosquito-borne viral encephalitis

Inclusions:

  • Mosquito-borne viral meningoencephalitis

Exclusions:

  • Venezuelan equine encephalitis (A92.2)

A83.0 Japanese encephalitis

A83.1 Western equine encephalitis

A83.2 Eastern equine encephalitis

A83.3 St Louis encephalitis

A83.4 Australian encephalitis

  • Kunjin virus disease

A83.5 California encephalitis

  • California meningoencephalitis
  • La Crosse encephalitis

A83.6 Rocio virus disease

A83.8 Other mosquito-borne viral encephalitis

A83.9 Mosquito-borne viral encephalitis unspecified

A84 Tick-borne viral encephalitis

Inclusions:

  • Tick-borne viral meningoencephalitis

A84.0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]

A84.1 Central European tick-borne encephalitis

A84.8 Other tick-borne viral encephalitis

  • Louping ill
  • Powassan virus disease

A84.9 Tick-borne viral encephalitis unspecified

A85 Other viral encephalitis not elsewhere classified

Inclusions:

Specified viral:

  • encephalomyelitis NEC
  • meningoencephalitis NEC

Exclusions:

Encephalitis due to:

  • herpesvirus [herpes simplex] (B00.4)
  • measles virus (B05.0)
  • mumps virus (B26.2)
  • poliomyelitis virus (A80.-)
  • zoster (B02.0)

Lymphocytic choriomeningitis (A87.2)
Myalgic encephalomyelitis (G93.3)

A85.0 Enteroviral encephalitis

  • Enteroviral encephalomyelitis

A85.1 Adenoviral encephalitis

  • Adenoviral meningoencephalitis

A85.2 Arthropod-borne viral encephalitis unspecified

A85.8 Other specified viral encephalitis

  • Encephalitis lethargica
  • Von Economo-Cruchet disease

A86 Unspecified viral encephalitis

Inclusions:

Viral:

  • encephalomyelitis NOS
  • meningoencephalitis NOS

A87 Viral meningitis

Exclusions:

Meningitis due to:

  • herpesvirus [herpes simplex] (B00.3)
  • measles virus (B05.1)
  • mumps virus (B26.1)
  • poliomyelitis virus (A80.-)
  • zoster (B02.1)

A87.0 Enteroviral meningitis

  • Coxsackievirus meningitis
  • Echovirus meningitis

A87.1 Adenoviral meningitis

A87.2 Lymphocytic choriomeningitis

  • Lymphocytic meningoencephalitis

A87.8 Other viral meningitis

A87.9 Viral meningitis unspecified

A88 Other viral infections of central nervous system not elsewhere classified

Exclusions:

Viral:

  • encephalitis NOS (A86)
  • meningitis NOS (A87.9)

A88.0 Enteroviral exanthematous fever [Boston exanthem]

A88.1 Epidemic vertigo

A88.8 Other specified viral infections of central nervous system

A89 Unspecified viral infection of central nervous system

Acute Poliomyelitis

Definition of Acute Poliomyelitis: A disease of the nervous system, caused by human poliovirus. This disease commonly presents with a fever, sore throat, headache, vomiting, or stiffness of the neck and back. This disease may present with an acute onset of flaccid paralysis. Transmission is commonly by the faecal-oral route or direct contact. Confirmation is by identification of poliovirus in a faecal sample or by a lumbar puncture.

ICD 11 Code For Acute Poliomyelitis

1C81  Acute poliomyelitis

ICD 10 Code For Acute Poliomyelitis


A80 Acute poliomyelitis

A80.0 Acute paralytic poliomyelitis vaccine-associated

A80.1 Acute paralytic poliomyelitis wild virus imported

A80.2 Acute paralytic poliomyelitis wild virus indigenous

A80.3 Acute paralytic poliomyelitis other and unspecified

A80.4 Acute nonparalytic poliomyelitis

A80.9 Acute poliomyelitis unspecified

Rabies

Definition of Rabies: A disease caused by infection with the rabies virus. This disease is characterised by fever, and headache, followed by neurological symptoms dominated by a furious or paralytic form.

ICD 11 Code For Rabies

1C82  Rabies

Coded Elsewhere:

  • Encephalitis due to classical rabies virus (1C80)

ICD 10 Code For Rabies


A82 Rabies

A82.0 Sylvatic rabies

A82.1 Urban rabies

A82.9 Rabies unspecified

Western Equine Encephalitis

ICD 11 Code For Western Equine Encephalitis

1C83  Western equine encephalitis

ICD 10 Code For Western Equine Encephalitis

A83.1 Western equine encephalitis

Eastern Equine Encephalitis

ICD 11 Code For Eastern Equine Encephalitis

1C84  Eastern equine encephalitis

ICD 10 Code For Eastern Equine Encephalitis

A83.2 Eastern equine encephalitis

Japanese Encephalitis

Definition of Japanese Encephalitis: A disease of the brain, caused by an infection with flavivirus. This disease is characterised by fever, headache, meningism, hyperexcitability, or decreased consciousness. This disease may also present with neurological signs such as cranial nerve palsies, tremor and ataxia, parkinsonism, or upper limb paralysis. Transmission is through the bite of an infected mosquito. Confirmation is by identification of flavivirus in a serum sample or cerebrospinal fluid.

ICD 11 Code For Japanese Encephalitis

1C85  Japanese encephalitis

ICD 10 Code For Japanese Encephalitis

A83.0 Japanese encephalitis

St Louis Encephalitis

ICD 11 Code For St Louis Encephalitis

  1C86  St Louis encephalitis

 ICD 10 Code For St Louis Encephalitis

A83.3 St Louis encephalitis

Rocio Viral Encephalitis

Definition of Rocio Viral Encephalitis: A disease of the brain, caused by an infection with Rocio virus. In the first phase, this disease is characterised by a fever, headache, vomiting, or conjunctivitis; in the second phase, this disease is characterised by neurological symptoms and muscle weakness. Transmission is through the bite of an infected mosquito. Confirmation is by identification of Rocio virus in a serum or cerebrospinal fluid sample.

ICD 11 Code For Rocio Viral Encephalitis

1C87  Rocio viral encephalitis

ICD 10 Code For Rocio Viral Encephalitis

A83.6 Rocio virus disease

Murray Valley Encephalitis

Definition of Murray Valley Encephalitis: A disease of the brain, caused by an infection with Murray Valley encephalitis virus. This disease is characterised by fever, headache, nausea, vomiting, tiredness, or may be asymptomatic. Severe cases may present with confusion, fatigue, lack of coordination, or encephalitis. Transmission is through the bite of an infected mosquito. Confirmation is by detection of anti-Murray Valley encephalitis antibodies in a serum sample.

ICD 11 Code For Murray Valley Encephalitis

1C88  Murray Valley encephalitis

Inclusions:

  • Australian encephalitis

ICD 10 Code For Murray Valley Encephalitis

A83.4 Australian encephalitis

  • Kunjin virus disease

Far Eastern Tick-Borne Encephalitis

ICD 11 Code For Far Eastern Tick-Borne Encephalitis

  1C89  Far Eastern tick-borne encephalitis

  ICD 10 Code For Far Eastern Tick-Borne Encephalitis

A84.0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]

Central European Tick-Borne Encephalitis

ICD 11 Code For Central European Tick-Borne Encephalitis

1C8A  Central European tick-borne encephalitis

ICD 10 Code For Central European Tick-Borne Encephalitis

A84.1 Central European tick-borne encephalitis

California Encephalitis

ICD 11 Code For California Encephalitis

1C8B  California encephalitis

Inclusions:

  • California meningoencephalitis

ICD 10 Code For California Encephalitis

A83.5 California encephalitis

  • California meningoencephalitis
  • La Crosse encephalitis

Venezuelan Equine Encephalitis

ICD 11 Code For Venezuelan Equine Encephalitis

1C8C  Venezuelan equine encephalitis

ICD 10 Code For Venezuelan Equine Encephalitis

A92.2 Venezuelan equine fever

  • Venezuelan Equine:
    – encephalitis
    – encephalomyelitis virus disease

La Crosse Encephalitis

ICD 11 Code For La Crosse Encephalitis

1C8D  La Crosse encephalitis

ICD 10 Code For La Crosse Encephalitis

A83.5 California encephalitis

  • California meningoencephalitis
  • La Crosse encephalitis

Viral Meningitis not elsewhere classified

Definition of Viral Meningitis not elsewhere classified: Any disease of the meninges, caused by an infection with a viral source.

ICD 11 Code For Viral Meningitis not elsewhere classified  

1C8E  Viral meningitis not elsewhere classified

Coded Elsewhere:

  • Meningitis due to mumps virus (1D80.2)
  • Measles complicated by meningitis (1F03.2)
  • Herpes simplex meningitis (1F00.20)
  • Varicella meningitis (1E90.1)
  • Meningitis due to human immunodeficiency virus (1C62.2)
  • Meningitis due to rubella virus (1F02.0)
  • Zoster meningitis (1E91.3)
  • Viral meningitis due to Epstein-Barr virus (1D81.0)
  • Viral meningitis due to Cytomegalovirus (1D82.Y)

ICD 10 Code For Viral Meningitis not elsewhere classified

A87.8 Other viral meningitis

Enteroviral Meningitis

Definition of Enteroviral Meningitis: A disease of the meninges, caused by an infection with enterovirus. This disease is characterised by high fever, headache, vomiting, nausea, stiff neck, photophobia, drowsiness, skin rash, confusion, seizures, or loss of consciousness. This disease may be asymptomatic in older adults. Transmission is through haematogenous spread to the meninges. Confirmation is by identification of enterovirus through a lumbar puncture, by agglutination tests, or by polymerase chain reaction.

ICD 11 Code For Enteroviral meningitis

1C8E.1 Enteroviral meningitis

ICD 10 Code For Enteroviral meningitis

A87.0 Enteroviral meningitis

  • Coxsackievirus meningitis
  • Echovirus meningitis

Meningitis due to adenovirus

Definition of Meningitis due to adenovirus: A disease of the meninges, caused by an infection with adenovirus. This disease is characterised by high fever, headache, vomiting, nausea, stiff neck, photophobia, drowsiness, skin rash, confusion, seizures, or loss of consciousness. This disease may be asymptomatic in older adults. Transmission is through haematogenous spread to the meninges. Confirmation is by identification of adenovirus through a lumbar puncture, by agglutination tests, or by polymerase chain reaction.

ICD 11 Code For Meningitis due to adenovirus

1C8E.2 Meningitis due to adenovirus

ICD 10 Code For Meningitis due to adenovirus

A87.1 Adenoviral meningitis

Other specified viral meningitis not elsewhere classified

ICD 11 Code For Other specified viral meningitis not elsewhere classified

1C8E.Y Other specified viral meningitis not elsewhere classified

ICD 10 Code For Other specified viral meningitis not elsewhere classified

A87.8 Other viral meningitis

Viral meningitis not elsewhere classified unspecified

ICD 11 Code For Viral meningitis not elsewhere classified unspecified

1C8E.Z Viral meningitis not elsewhere classified unspecified

ICD 10 Code For Viral meningitis not elsewhere classified unspecified

A87.9 Viral meningitis unspecified

Lymphocytic Choriomeningitis

Definition of Lymphocytic Choriomeningitis: A disease of the meninges, caused by an infection with lymphocytic choriomeningitis virus. This disease is characterised by fever, stiffness of the neck, malaise, lack of appetite, myalgia, headache, nausea, vomiting, or is asymptomatic. This disease may also present with cough, sore throat, arthralgia, testicular pain, or parotid pain. Transmission is by direct contact with body fluids from an infected rodent, through the bite of an infected rodent, or by droplet transmission. Confirmation is by identification of lymphocytic choriomeningitis virus in a blood or tissue sample.

ICD 11 Code For Lymphocytic Choriomeningitis

1C8F  Lymphocytic choriomeningitis

Exclusions:

  • Encephalitis due to Lymphocytic choriomeningitis virus
  • meningoencephalitis due to Lymphocytic choriomeningitis virus

ICD 10 Code For Lymphocytic Choriomeningitis

A87.2 Lymphocytic choriomeningitis

  • Lymphocytic meningoencephalitis

Other specified viral infections of the central nervous system

ICD 11 Code For Other specified viral infections of the central nervous system

1C8Y  Other specified viral infections of the central nervous system

ICD 10 Code For Other specified viral infections of the central nervous system

A88.8 Other specified viral infections of central nervous system

Viral infections of the central nervous system unspecified

ICD 11 Code For Viral infections of the central nervous system unspecified

  1C8Z  Viral infections of the central nervous system unspecified

ICD 10 Code For Viral infections of the central nervous system unspecified

A89 Unspecified viral infection of central nervous system

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