1. 2023 ICD-10-CM Index
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2. 'E' Terms
›
3. Index Terms Starting With 'E' (Encephalitis)

Index Terms Starting With 'E' (Encephalitis)

• Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) G04.90

  ICD-10-CM Diagnosis Code G04.90

  Encephalitis and encephalomyelitis, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Ventriculitis (cerebral) NOS

  • acute A86
    - see also Encephalitis, viral
    ICD-10-CM Diagnosis Code A86

    Unspecified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Viral encephalomyelitis NOS
    • Viral meningoencephalitis NOS
    • disseminated G04.00
      ICD-10-CM Diagnosis Code G04.00

      Acute disseminated encephalitis and encephalomyelitis, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      • infectious G04.01
        ICD-10-CM Diagnosis Code G04.01

        Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

        Type 1 Excludes

        • post chickenpox encephalitis (B01.1)
        • post measles encephalitis (B05.0)
        • post measles myelitis (B05.1)
      • noninfectious G04.81
        ICD-10-CM Diagnosis Code G04.81

        Other encephalitis and encephalomyelitis

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

        Applicable To

        • Noninfectious acute disseminated encephalomyelitis (noninfectious ADEM)
      • postimmunization G04.02
        (postvaccination)
        ICD-10-CM Diagnosis Code G04.02

        Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

        Applicable To

        • Encephalitis, post immunization
        • Encephalomyelitis, post immunization

        Use Additional

        • code to identify the vaccine (T50.A-, T50.B-, T50.Z-)
      • postinfectious G04.01
        ICD-10-CM Diagnosis Code G04.01

        Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

        Type 1 Excludes

        • post chickenpox encephalitis (B01.1)
        • post measles encephalitis (B05.0)
        • post measles myelitis (B05.1)
    • inclusion body A85.8
      ICD-10-CM Diagnosis Code A85.8

      Other specified viral encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Encephalitis lethargica
      • Von Economo-Cruchet disease
    • necrotizing hemorrhagic G04.30
      ICD-10-CM Diagnosis Code G04.30

      Acute necrotizing hemorrhagic encephalopathy, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      • postimmunization G04.32
        ICD-10-CM Diagnosis Code G04.32

        Postimmunization acute necrotizing hemorrhagic encephalopathy

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

        Use Additional

        • code to identify the vaccine (T50.A-, T50.B-, T50.Z-)
      • postinfectious G04.31
        ICD-10-CM Diagnosis Code G04.31

        Postinfectious acute necrotizing hemorrhagic encephalopathy

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      • specified NEC G04.39
        ICD-10-CM Diagnosis Code G04.39

        Other acute necrotizing hemorrhagic encephalopathy

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

        Code Also

        • underlying etiology, if applicable
  • arboviral, arbovirus NEC A85.2
    ICD-10-CM Diagnosis Code A85.2

    Arthropod-borne viral encephalitis, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Type 1 Excludes

    • West nile virus with encephalitis (A92.31)
  • arthropod-borne NEC A85.2
    (viral)
    ICD-10-CM Diagnosis Code A85.2

    Arthropod-borne viral encephalitis, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Type 1 Excludes

    • West nile virus with encephalitis (A92.31)
  • Australian A83.4
    ICD-10-CM Diagnosis Code A83.4

    Australian encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Kunjin virus disease
  • California A83.5
    (virus)
    ICD-10-CM Diagnosis Code A83.5

    California encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • California meningoencephalitis
    • La Crosse encephalitis
  • Central European A84.1
    (tick-borne)
    ICD-10-CM Diagnosis Code A84.1

    Central European tick-borne encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Czechoslovakian A84.1
    ICD-10-CM Diagnosis Code A84.1

    Central European tick-borne encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Dawson's A81.1
    (inclusion body)
    ICD-10-CM Diagnosis Code A81.1

    Subacute sclerosing panencephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Dawson's inclusion body encephalitis
    • Van Bogaert's sclerosing leukoencephalopathy
  • diffuse sclerosing A81.1
    ICD-10-CM Diagnosis Code A81.1

    Subacute sclerosing panencephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Dawson's inclusion body encephalitis
    • Van Bogaert's sclerosing leukoencephalopathy
  • disseminated, acute G04.00
    ICD-10-CM Diagnosis Code G04.00

    Acute disseminated encephalitis and encephalomyelitis, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • due to
    • cat scratch disease A28.1
      ICD-10-CM Diagnosis Code A28.1

      Cat-scratch disease

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Cat-scratch fever
    • human immunodeficiency virus B20
      (HIV)
      ICD-10-CM Diagnosis Code B20

      Human immunodeficiency virus [HIV] disease

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Code First

      • Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium, if applicable (O98.7-)

      Includes

      • acquired immune deficiency syndrome [AIDS]
      • AIDS-related complex [ARC]
      • HIV infection, symptomatic

      Type 1 Excludes

      • asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
      • exposure to HIV virus (Z20.6)
      • inconclusive serologic evidence of HIV (R75)

      Use Additional

      • code(s) to identify all manifestations of HIV infection
    • malaria - see Malaria
    • rickettsiosis - see Rickettsiosis
    • smallpox inoculation G04.02
      ICD-10-CM Diagnosis Code G04.02

      Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Encephalitis, post immunization
      • Encephalomyelitis, post immunization

      Use Additional

      • code to identify the vaccine (T50.A-, T50.B-, T50.Z-)
    • typhus - see Typhus
  • Eastern equine A83.2
    ICD-10-CM Diagnosis Code A83.2

    Eastern equine encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • endemic A86
    (viral)
    ICD-10-CM Diagnosis Code A86

    Unspecified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Viral encephalomyelitis NOS
    • Viral meningoencephalitis NOS
  • epidemic NEC A86
    (viral)
    ICD-10-CM Diagnosis Code A86

    Unspecified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Viral encephalomyelitis NOS
    • Viral meningoencephalitis NOS
  • equine (acute) (infectious) (viral) A83.9
    ICD-10-CM Diagnosis Code A83.9

    Mosquito-borne viral encephalitis, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • Eastern A83.2
      ICD-10-CM Diagnosis Code A83.2

      Eastern equine encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • Venezuelan A92.2
      ICD-10-CM Diagnosis Code A92.2

      Venezuelan equine fever

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Venezuelan equine encephalitis
      • Venezuelan equine encephalomyelitis virus disease
    • Western A83.1
      ICD-10-CM Diagnosis Code A83.1

      Western equine encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Far Eastern A84.0
    (tick-borne)
    ICD-10-CM Diagnosis Code A84.0

    Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • following vaccination or other immunization procedure G04.02
    ICD-10-CM Diagnosis Code G04.02

    Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Encephalitis, post immunization
    • Encephalomyelitis, post immunization

    Use Additional

    • code to identify the vaccine (T50.A-, T50.B-, T50.Z-)
  • herpes zoster B02.0
    ICD-10-CM Diagnosis Code B02.0

    Zoster encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Zoster meningoencephalitis
  • herpesviral B00.4
    ICD-10-CM Diagnosis Code B00.4

    Herpesviral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Herpesviral meningoencephalitis
    • Simian B disease

    Type 1 Excludes

    • herpesviral encephalitis due to herpesvirus 6 and 7 (B10.01, B10.09)
    • non-simplex herpesviral encephalitis (B10.0-)
    • due to herpesvirus 6 B10.01
      ICD-10-CM Diagnosis Code B10.01

      Human herpesvirus 6 encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • due to herpesvirus 7 B10.09
      ICD-10-CM Diagnosis Code B10.09

      Other human herpesvirus encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Human herpesvirus 7 encephalitis
    • specified NEC B10.09
      ICD-10-CM Diagnosis Code B10.09

      Other human herpesvirus encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Human herpesvirus 7 encephalitis
  • Ilheus A83.8
    (virus)
    ICD-10-CM Diagnosis Code A83.8

    Other mosquito-borne viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • in (due to)
    • actinomycosis A42.82
      ICD-10-CM Diagnosis Code A42.82

      Actinomycotic encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • adenovirus A85.1
      ICD-10-CM Diagnosis Code A85.1

      Adenoviral encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Adenoviral meningoencephalitis
    • African trypanosomiasis B56.9
      ICD-10-CM Diagnosis Code B56.9

      African trypanosomiasis, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Sleeping sickness NOS
    • Chagas' disease B57.42
      (chronic)
      ICD-10-CM Diagnosis Code B57.42

      Meningoencephalitis in Chagas' disease

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • cytomegalovirus B25.8
      ICD-10-CM Diagnosis Code B25.8

      Other cytomegaloviral diseases

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Cytomegaloviral encephalitis
    • enterovirus A85.0
      ICD-10-CM Diagnosis Code A85.0

      Enteroviral encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Enteroviral encephalomyelitis
    • herpes (simplex) B00.4
      ICD-10-CM Diagnosis Code B00.4

      Herpesviral encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Herpesviral meningoencephalitis
      • Simian B disease

      Type 1 Excludes

      • herpesviral encephalitis due to herpesvirus 6 and 7 (B10.01, B10.09)
      • non-simplex herpesviral encephalitis (B10.0-)
      • due to herpesvirus 6 B10.01
        ICD-10-CM Diagnosis Code B10.01

        Human herpesvirus 6 encephalitis

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      • due to herpesvirus 7 B10.09
        ICD-10-CM Diagnosis Code B10.09

        Other human herpesvirus encephalitis

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

        Applicable To

        • Human herpesvirus 7 encephalitis
      • specified NEC B10.09
        ICD-10-CM Diagnosis Code B10.09

        Other human herpesvirus encephalitis

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

        Applicable To

        • Human herpesvirus 7 encephalitis
    • infectious disease NEC B99
      ICD-10-CM Diagnosis Code B99

      Other and unspecified infectious diseases

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    • influenza - see Influenza, with, encephalopathy
    • listeriosis A32.12
      ICD-10-CM Diagnosis Code A32.12

      Listerial meningoencephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • measles B05.0
      ICD-10-CM Diagnosis Code B05.0

      Measles complicated by encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Postmeasles encephalitis
    • mumps B26.2
      ICD-10-CM Diagnosis Code B26.2

      Mumps encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • naegleriasis B60.2
      ICD-10-CM Diagnosis Code B60.2

      Naegleriasis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Primary amebic meningoencephalitis
    • parasitic disease NEC B89
      ICD-10-CM Diagnosis Code B89

      Unspecified parasitic disease

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • poliovirus A80.9
      ICD-10-CM Diagnosis Code A80.9

      Acute poliomyelitis, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • rubella B06.01
      ICD-10-CM Diagnosis Code B06.01

      Rubella encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Rubella meningoencephalitis
    • syphilis
      • congenital A50.42
        ICD-10-CM Diagnosis Code A50.42

        Late congenital syphilitic encephalitis

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      • late A52.14
        ICD-10-CM Diagnosis Code A52.14

        Late syphilitic encephalitis

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • systemic lupus erythematosus M32.19
      ICD-10-CM Diagnosis Code M32.19

      Other organ or system involvement in systemic lupus erythematosus

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • toxoplasmosis (acquired) B58.2
      ICD-10-CM Diagnosis Code B58.2

      Toxoplasma meningoencephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      • congenital P37.1
        ICD-10-CM Diagnosis Code P37.1

        Congenital toxoplasmosis

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Code on Newborn Record

        Applicable To

        • Hydrocephalus due to congenital toxoplasmosis
    • tuberculosis A17.82
      ICD-10-CM Diagnosis Code A17.82

      Tuberculous meningoencephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Tuberculous myelitis
    • zoster B02.0
      ICD-10-CM Diagnosis Code B02.0

      Zoster encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Zoster meningoencephalitis
  • inclusion body A81.1
    ICD-10-CM Diagnosis Code A81.1

    Subacute sclerosing panencephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Dawson's inclusion body encephalitis
    • Van Bogaert's sclerosing leukoencephalopathy
  • infectious A86
    (acute) (virus)
    ICD-10-CM Diagnosis Code A86

    Unspecified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Viral encephalomyelitis NOS
    • Viral meningoencephalitis NOS
  • Japanese A83.0
    (B type)
    ICD-10-CM Diagnosis Code A83.0

    Japanese encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • La Crosse A83.5
    ICD-10-CM Diagnosis Code A83.5

    California encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • California meningoencephalitis
    • La Crosse encephalitis
  • lead - see Poisoning, lead
  • lethargica A85.8
    (acute) (infectious)
    ICD-10-CM Diagnosis Code A85.8

    Other specified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Encephalitis lethargica
    • Von Economo-Cruchet disease
  • louping ill A84.89
    ICD-10-CM Diagnosis Code A84.89

    Other tick-borne viral encephalitis

    2021 - New Code 2022 2023 Billable/Specific Code

    Applicable To

    • Louping ill

    Code First

    • , if applicable, transfusion related infection (T80.22-)
  • lupus erythematosus, systemic M32.19
    ICD-10-CM Diagnosis Code M32.19

    Other organ or system involvement in systemic lupus erythematosus

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • lymphatica A87.2
    ICD-10-CM Diagnosis Code A87.2

    Lymphocytic choriomeningitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Lymphocytic meningoencephalitis
  • Mengo A85.8
    ICD-10-CM Diagnosis Code A85.8

    Other specified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Encephalitis lethargica
    • Von Economo-Cruchet disease
  • meningococcal A39.81
    ICD-10-CM Diagnosis Code A39.81

    Meningococcal encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Murray Valley A83.4
    ICD-10-CM Diagnosis Code A83.4

    Australian encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Kunjin virus disease
  • otitic NEC H66.40
    ICD-10-CM Diagnosis Code H66.40

    Suppurative otitis media, unspecified, unspecified ear

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • parasitic NOS B71.9
    ICD-10-CM Diagnosis Code B71.9

    Cestode infection, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Tapeworm (infection) NOS
  • periaxial G37.0
    ICD-10-CM Diagnosis Code G37.0

    Diffuse sclerosis of central nervous system

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Periaxial encephalitis
    • Schilder's disease

    Type 1 Excludes

    • X linked adrenoleukodystrophy (E71.52-)
  • periaxialis G37.5
    (concentrica) (diffuse)
    ICD-10-CM Diagnosis Code G37.5

    Concentric sclerosis [Balo] of central nervous system

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • postchickenpox B01.11
    ICD-10-CM Diagnosis Code B01.11

    Varicella encephalitis and encephalomyelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Postchickenpox encephalitis and encephalomyelitis
  • postexanthematous NEC B09
    ICD-10-CM Diagnosis Code B09

    Unspecified viral infection characterized by skin and mucous membrane lesions

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Viral enanthema NOS
    • Viral exanthema NOS
  • postimmunization G04.02
    ICD-10-CM Diagnosis Code G04.02

    Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Encephalitis, post immunization
    • Encephalomyelitis, post immunization

    Use Additional

    • code to identify the vaccine (T50.A-, T50.B-, T50.Z-)
  • postinfectious NEC G04.01
    ICD-10-CM Diagnosis Code G04.01

    Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Type 1 Excludes

    • post chickenpox encephalitis (B01.1)
    • post measles encephalitis (B05.0)
    • post measles myelitis (B05.1)
  • postmeasles B05.0
    ICD-10-CM Diagnosis Code B05.0

    Measles complicated by encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Postmeasles encephalitis
  • postvaccinal G04.02
    ICD-10-CM Diagnosis Code G04.02

    Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Encephalitis, post immunization
    • Encephalomyelitis, post immunization

    Use Additional

    • code to identify the vaccine (T50.A-, T50.B-, T50.Z-)
  • postvaricella B01.11
    ICD-10-CM Diagnosis Code B01.11

    Varicella encephalitis and encephalomyelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Postchickenpox encephalitis and encephalomyelitis
  • postviral NEC A86
    ICD-10-CM Diagnosis Code A86

    Unspecified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Viral encephalomyelitis NOS
    • Viral meningoencephalitis NOS
  • Powassan A84.81
    ICD-10-CM Diagnosis Code A84.81

    Powassan virus disease

    2021 - New Code 2022 2023 Billable/Specific Code
  • Rasmussen G04.81
    ICD-10-CM Diagnosis Code G04.81

    Other encephalitis and encephalomyelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Noninfectious acute disseminated encephalomyelitis (noninfectious ADEM)
  • Rio Bravo A85.8
    ICD-10-CM Diagnosis Code A85.8

    Other specified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Encephalitis lethargica
    • Von Economo-Cruchet disease
  • Russian
    • autumnal A83.0
      ICD-10-CM Diagnosis Code A83.0

      Japanese encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • spring-summer A84.0
      (taiga)
      ICD-10-CM Diagnosis Code A84.0

      Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • saturnine - see Poisoning, lead
  • specified NEC G04.81
    ICD-10-CM Diagnosis Code G04.81

    Other encephalitis and encephalomyelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Noninfectious acute disseminated encephalomyelitis (noninfectious ADEM)
  • St. Louis A83.3
    ICD-10-CM Diagnosis Code A83.3

    St Louis encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • subacute sclerosing A81.1
    ICD-10-CM Diagnosis Code A81.1

    Subacute sclerosing panencephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Dawson's inclusion body encephalitis
    • Van Bogaert's sclerosing leukoencephalopathy
  • summer A83.0
    ICD-10-CM Diagnosis Code A83.0

    Japanese encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • suppurative G04.81
    ICD-10-CM Diagnosis Code G04.81

    Other encephalitis and encephalomyelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Noninfectious acute disseminated encephalomyelitis (noninfectious ADEM)
  • tick-borne A84.9
    ICD-10-CM Diagnosis Code A84.9

    Tick-borne viral encephalitis, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Torula, torular B45.1
    (cryptococcal)
    ICD-10-CM Diagnosis Code B45.1

    Cerebral cryptococcosis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Cryptococcal meningitis
    • Cryptococcosis meningocerebralis
  • toxic NEC G92.8
    ICD-10-CM Diagnosis Code G92.8

    Other toxic encephalopathy

    2022 - New Code 2023 Billable/Specific Code

    Applicable To

    • Toxic encephalitis
    • Toxic metabolic encephalopathy

    Code First

    • poisoning due to drug or toxin, if applicable, (T36-T65 with fifth or sixth character 1-4 or 6)

    Use Additional

    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • trichinosis B75
    ICD-10-CM Diagnosis Code B75

    Trichinellosis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Includes

    • infection due to Trichinella species
    • trichiniasis
  • type
    • B A83.0
      ICD-10-CM Diagnosis Code A83.0

      Japanese encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • C A83.3
      ICD-10-CM Diagnosis Code A83.3

      St Louis encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • van Bogaert's A81.1
    ICD-10-CM Diagnosis Code A81.1

    Subacute sclerosing panencephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Dawson's inclusion body encephalitis
    • Van Bogaert's sclerosing leukoencephalopathy
  • Venezuelan equine A92.2
    ICD-10-CM Diagnosis Code A92.2

    Venezuelan equine fever

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Venezuelan equine encephalitis
    • Venezuelan equine encephalomyelitis virus disease
  • Vienna A85.8
    ICD-10-CM Diagnosis Code A85.8

    Other specified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Encephalitis lethargica
    • Von Economo-Cruchet disease
  • viral, virus A86
    ICD-10-CM Diagnosis Code A86

    Unspecified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Viral encephalomyelitis NOS
    • Viral meningoencephalitis NOS
    • arthropod-borne NEC A85.2
      ICD-10-CM Diagnosis Code A85.2

      Arthropod-borne viral encephalitis, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Type 1 Excludes

      • West nile virus with encephalitis (A92.31)
      • mosquito-borne A83.9
        ICD-10-CM Diagnosis Code A83.9

        Mosquito-borne viral encephalitis, unspecified

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • Australian X disease A83.4
          ICD-10-CM Diagnosis Code A83.4

          Australian encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

          Applicable To

          • Kunjin virus disease
        • California virus A83.5
          ICD-10-CM Diagnosis Code A83.5

          California encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

          Applicable To

          • California meningoencephalitis
          • La Crosse encephalitis
        • Eastern equine A83.2
          ICD-10-CM Diagnosis Code A83.2

          Eastern equine encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • Japanese A83.0
          (B type)
          ICD-10-CM Diagnosis Code A83.0

          Japanese encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • Murray Valley A83.4
          ICD-10-CM Diagnosis Code A83.4

          Australian encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

          Applicable To

          • Kunjin virus disease
        • specified NEC A83.8
          ICD-10-CM Diagnosis Code A83.8

          Other mosquito-borne viral encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • St. Louis A83.3
          ICD-10-CM Diagnosis Code A83.3

          St Louis encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • type B A83.0
          ICD-10-CM Diagnosis Code A83.0

          Japanese encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • type C A83.3
          ICD-10-CM Diagnosis Code A83.3

          St Louis encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • Western equine A83.1
          ICD-10-CM Diagnosis Code A83.1

          Western equine encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      • tick-borne A84.9
        ICD-10-CM Diagnosis Code A84.9

        Tick-borne viral encephalitis, unspecified

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • biundulant A84.1
          ICD-10-CM Diagnosis Code A84.1

          Central European tick-borne encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • central European A84.1
          ICD-10-CM Diagnosis Code A84.1

          Central European tick-borne encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • Czechoslovakian A84.1
          ICD-10-CM Diagnosis Code A84.1

          Central European tick-borne encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • diphasic meningoencephalitis A84.1
          ICD-10-CM Diagnosis Code A84.1

          Central European tick-borne encephalitis

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • Far Eastern A84.0
          ICD-10-CM Diagnosis Code A84.0

          Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • Russian spring-summer A84.0
          (taiga)
          ICD-10-CM Diagnosis Code A84.0

          Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • specified NEC A84.89
          ICD-10-CM Diagnosis Code A84.89

          Other tick-borne viral encephalitis

          2021 - New Code 2022 2023 Billable/Specific Code

          Applicable To

          • Louping ill

          Code First

          • , if applicable, transfusion related infection (T80.22-)
    • specified type NEC A85.8
      ICD-10-CM Diagnosis Code A85.8

      Other specified viral encephalitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Encephalitis lethargica
      • Von Economo-Cruchet disease
    • tick-borne, specified NEC A84.89
      ICD-10-CM Diagnosis Code A84.89

      Other tick-borne viral encephalitis

      2021 - New Code 2022 2023 Billable/Specific Code

      Applicable To

      • Louping ill

      Code First

      • , if applicable, transfusion related infection (T80.22-)
  • Western equine A83.1
    ICD-10-CM Diagnosis Code A83.1

    Western equine encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code