G20 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Parkinson's disease.
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Hemiparkinsonism
Idiopathic Parkinsonism or Parkinson's disease
Paralysis agitans
Primary Parkinsonism or Parkinson's disease
Code, if applicable, to identify:
Dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
Dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
Dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
Dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
Mild neurocognitive disorder due to known physiological condition (F06.7-)
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