1. 2023 ICD-10-CM Index
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2. 'M' Terms
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3. Index Terms Starting With 'M' (Myelitis)

Index Terms Starting With 'M' (Myelitis)

• Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute) G04.91

  - see also Encephalitis

  ICD-10-CM Diagnosis Code G04.91

  Myelitis, unspecified

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

  • flaccid G04.82
    ICD-10-CM Diagnosis Code G04.82

    Acute flaccid myelitis

    2022 - New Code 2023 Billable/Specific Code

    Type 1 Excludes

    • transverse myelitis (G37.3)
  • herpes simplex B00.82
    ICD-10-CM Diagnosis Code B00.82

    Herpes simplex myelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • herpes zoster B02.24
    ICD-10-CM Diagnosis Code B02.24

    Postherpetic myelitis

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

    Applicable To

    • Herpes zoster myelitis
  • in diseases classified elsewhere G05.4
    ICD-10-CM Diagnosis Code G05.4

    Myelitis in diseases classified elsewhere

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

    Applicable To

    • Meningomyelitis in diseases classified elsewhere
  • necrotizing, subacute G37.4
    ICD-10-CM Diagnosis Code G37.4

    Subacute necrotizing myelitis of central nervous system

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • optic neuritis in G36.0
    ICD-10-CM Diagnosis Code G36.0

    Neuromyelitis optica [Devic]

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

    Applicable To

    • Demyelination in optic neuritis

    Type 1 Excludes

    • optic neuritis NOS (H46)
  • postchickenpox B01.12
    ICD-10-CM Diagnosis Code B01.12

    Varicella myelitis

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

    Applicable To

    • Postchickenpox myelitis
  • postherpetic B02.24
    ICD-10-CM Diagnosis Code B02.24

    Postherpetic myelitis

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

    Applicable To

    • Herpes zoster myelitis
  • 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 G04.89
    ICD-10-CM Diagnosis Code G04.89

    Other myelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • 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-)
  • specified NEC G04.89
    ICD-10-CM Diagnosis Code G04.89

    Other myelitis

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

    Late syphilitic encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • toxic G92.9
    ICD-10-CM Diagnosis Code G92.9

    Unspecified toxic encephalopathy

    2022 - New Code 2023 Billable/Specific Code

    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)
  • transverse G37.3
    (in demyelinating diseases of central nervous system)
    ICD-10-CM Diagnosis Code G37.3

    Acute transverse myelitis in demyelinating disease of central nervous system

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

    Applicable To

    • Acute transverse myelitis NOS
    • Acute transverse myelopathy

    Type 1 Excludes

    • acute flaccid myelitis (G04.82)
    • multiple sclerosis (G35)
    • neuromyelitis optica [Devic] (G36.0)
  • tuberculous 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
  • varicella B01.12
    ICD-10-CM Diagnosis Code B01.12

    Varicella myelitis

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

    Applicable To

    • Postchickenpox myelitis