• Encephalomyelitis G04.90
    - see also Encephalitis
    ICD-10-CM Diagnosis Code G04.90

    Encephalitis and encephalomyelitis, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Ventriculitis (cerebral) NOS

    • acute disseminated G04.00
      ICD-10-CM Diagnosis Code G04.00

      Acute disseminated encephalitis and encephalomyelitis, unspecified

        2016 2017 2018 2019 2020 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 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 Billable/Specific Code
        Applicable To
        • Noninfectious acute disseminated encephalomyelitis (noninfectious ADEM)
      • postimmunization G04.02
        ICD-10-CM Diagnosis Code G04.02

        Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis

          2016 2017 2018 2019 2020 Billable/Specific Code
        Applicable To
        • Encephalitis, post immunization
        • Encephalomyelitis, post immunization
        Use Additional
      • postinfectious G04.01
        ICD-10-CM Diagnosis Code G04.01

        Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)

          2016 2017 2018 2019 2020 Billable/Specific Code
        Type 1 Excludes
        • post chickenpox encephalitis (B01.1)
        • post measles encephalitis (B05.0)
        • post measles myelitis (B05.1)
    • acute necrotizing hemorrhagic G04.30
      ICD-10-CM Diagnosis Code G04.30

      Acute necrotizing hemorrhagic encephalopathy, unspecified

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

        Postimmunization acute necrotizing hemorrhagic encephalopathy

          2016 2017 2018 2019 2020 Billable/Specific Code
        Use Additional
      • postinfectious G04.31
        ICD-10-CM Diagnosis Code G04.31

        Postinfectious acute necrotizing hemorrhagic encephalopathy

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

        Other acute necrotizing hemorrhagic encephalopathy

          2016 2017 2018 2019 2020 Billable/Specific Code
        Code Also
        • underlying etiology, if applicable
    • benign myalgic G93.3
      ICD-10-CM Diagnosis Code G93.3

      Postviral fatigue syndrome

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Benign myalgic encephalomyelitis
      Type 1 Excludes
      • chronic fatigue syndrome NOS (R53.82)
    • equine A83.9
      ICD-10-CM Diagnosis Code A83.9

      Mosquito-borne viral encephalitis, unspecified

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

        Eastern equine encephalitis

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

        Venezuelan equine fever

          2016 2017 2018 2019 2020 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 Billable/Specific Code
    • in diseases classified elsewhere G05.3
      ICD-10-CM Diagnosis Code G05.3

      Encephalitis and encephalomyelitis in diseases classified elsewhere

        2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
      Applicable To
      • Meningoencephalitis in diseases classified elsewhere
    • myalgic, benign G93.3
      ICD-10-CM Diagnosis Code G93.3

      Postviral fatigue syndrome

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Benign myalgic encephalomyelitis
      Type 1 Excludes
      • chronic fatigue syndrome NOS (R53.82)
    • postchickenpox B01.11
      ICD-10-CM Diagnosis Code B01.11

      Varicella encephalitis and encephalomyelitis

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Postchickenpox encephalitis and encephalomyelitis
    • postinfectious NEC G04.01
      ICD-10-CM Diagnosis Code G04.01

      Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)

        2016 2017 2018 2019 2020 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 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 Billable/Specific Code
      Applicable To
      • Encephalitis, post immunization
      • Encephalomyelitis, post immunization
      Use Additional
    • postvaricella B01.11
      ICD-10-CM Diagnosis Code B01.11

      Varicella encephalitis and encephalomyelitis

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Postchickenpox encephalitis and encephalomyelitis
    • rubella B06.01
      ICD-10-CM Diagnosis Code B06.01

      Rubella encephalitis

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Rubella meningoencephalitis
    • specified NEC G04.81
      ICD-10-CM Diagnosis Code G04.81

      Other encephalitis and encephalomyelitis

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Noninfectious acute disseminated encephalomyelitis (noninfectious ADEM)
    • Venezuelan equine A92.2
      ICD-10-CM Diagnosis Code A92.2

      Venezuelan equine fever

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Venezuelan equine encephalitis
      • Venezuelan equine encephalomyelitis virus disease