• Parkinsonism (idiopathic) (primary) G20
    ICD-10-CM Diagnosis Code G20

    Parkinson's disease

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Hemiparkinsonism
    • Idiopathic Parkinsonism or Parkinson's disease
    • Paralysis agitans
    • Parkinsonism or Parkinson's disease NOS
    • Primary Parkinsonism or Parkinson's disease
    Type 1 Excludes
    • dementia with Parkinsonism (G31.83)

    • arteriosclerotic G21.4
      ICD-10-CM Diagnosis Code G21.4

      Vascular parkinsonism

        2016 2017 2018 2019 Billable/Specific Code
    • dementia G31.83
      ICD-10-CM Diagnosis Code G31.83

      Dementia with Lewy bodies

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Dementia with Parkinsonism
      • Lewy body dementia
      • Lewy body disease
      • with behavioral disturbance G31.83
        ICD-10-CM Diagnosis Code G31.83

        Dementia with Lewy bodies

          2016 2017 2018 2019 Billable/Specific Code
        Applicable To
        • Dementia with Parkinsonism
        • Lewy body dementia
        • Lewy body disease
    • due to
      • drugs NEC G21.19
        ICD-10-CM Diagnosis Code G21.19

        Other drug induced secondary parkinsonism

          2016 2017 2018 2019 Billable/Specific Code
        Applicable To
        • Other medication-induced parkinsonism
        Use Additional
        • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
        • neuroleptic G21.11
          ICD-10-CM Diagnosis Code G21.11

          Neuroleptic induced parkinsonism

            2016 2017 2018 2019 Billable/Specific Code
          Type 1 Excludes
          • malignant neuroleptic syndrome (G21.0)
          Use Additional
    • medication-induced NEC G21.19
      ICD-10-CM Diagnosis Code G21.19

      Other drug induced secondary parkinsonism

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Other medication-induced parkinsonism
      Use Additional
      • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
    • neuroleptic induced G21.11
      ICD-10-CM Diagnosis Code G21.11

      Neuroleptic induced parkinsonism

        2016 2017 2018 2019 Billable/Specific Code
      Type 1 Excludes
      • malignant neuroleptic syndrome (G21.0)
      Use Additional
    • postencephalitic G21.3
      ICD-10-CM Diagnosis Code G21.3

      Postencephalitic parkinsonism

        2016 2017 2018 2019 Billable/Specific Code
    • secondary G21.9
      ICD-10-CM Diagnosis Code G21.9

      Secondary parkinsonism, unspecified

        2016 2017 2018 2019 Billable/Specific Code
      • due to
        • arteriosclerosis G21.4
          ICD-10-CM Diagnosis Code G21.4

          Vascular parkinsonism

            2016 2017 2018 2019 Billable/Specific Code
        • drugs NEC G21.19
          ICD-10-CM Diagnosis Code G21.19

          Other drug induced secondary parkinsonism

            2016 2017 2018 2019 Billable/Specific Code
          Applicable To
          • Other medication-induced parkinsonism
          Use Additional
          • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
          • neuroleptic G21.11
            ICD-10-CM Diagnosis Code G21.11

            Neuroleptic induced parkinsonism

              2016 2017 2018 2019 Billable/Specific Code
            Type 1 Excludes
            • malignant neuroleptic syndrome (G21.0)
            Use Additional
        • encephalitis G21.3
          ICD-10-CM Diagnosis Code G21.3

          Postencephalitic parkinsonism

            2016 2017 2018 2019 Billable/Specific Code
        • external agents NEC G21.2
          ICD-10-CM Diagnosis Code G21.2

          Secondary parkinsonism due to other external agents

            2016 2017 2018 2019 Billable/Specific Code
          Code First
          • (T51-T65) to identify external agent
        • syphilis A52.19
          ICD-10-CM Diagnosis Code A52.19

          Other symptomatic neurosyphilis

            2016 2017 2018 2019 Billable/Specific Code
          Applicable To
          • Syphilitic parkinsonism
      • specified NEC G21.8
        ICD-10-CM Diagnosis Code G21.8

        Other secondary parkinsonism

          2016 2017 2018 2019 Billable/Specific Code
    • syphilitic A52.19
      ICD-10-CM Diagnosis Code A52.19

      Other symptomatic neurosyphilis

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Syphilitic parkinsonism
    • treatment-induced NEC G21.19
      ICD-10-CM Diagnosis Code G21.19

      Other drug induced secondary parkinsonism

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Other medication-induced parkinsonism
      Use Additional
      • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
    • vascular G21.4
      ICD-10-CM Diagnosis Code G21.4

      Vascular parkinsonism

        2016 2017 2018 2019 Billable/Specific Code
    • with neurogenic orthostatic hypotension G90.3
      (symptomatic)
      ICD-10-CM Diagnosis Code G90.3

      Multi-system degeneration of the autonomic nervous system

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Neurogenic orthostatic hypotension [Shy-Drager]
      Type 1 Excludes
      • orthostatic hypotension NOS (I95.1)