2025
ICD-10-CM
Diagnosis
Code

G20 Parkinson's disease

  • Non-billable
  • 2016–2025

G20 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Parkinson's disease.

Inclusion term

  • Hemiparkinsonism

  • Idiopathic Parkinsonism or Parkinson's disease

  • Paralysis agitans

  • Primary Parkinsonism or Parkinson's disease

Use additional code

Codes

Versions

  1. 2025

    No changes

  2. 2024

    Code changed

    • Inclusion term

        • Hemiparkinsonism
        • Idiopathic Parkinsonism or Parkinson's disease
        • Paralysis agitans
        • Parkinsonism or Parkinson's disease NOS
        • Primary Parkinsonism or Parkinson's disease
        • Hemiparkinsonism
        • Idiopathic Parkinsonism or Parkinson's disease
        • Paralysis agitans
        • Primary Parkinsonism or Parkinson's disease

  3. 2023

    Code changed

    • Type 1 excludes

        • dementia with Parkinsonism (G31.83)

    • Use additional code

        • code to identify:
        • dementia with behavioral disturbance (F02.81)
        • dementia without behavioral disturbance (F02.80)
        • code, if applicable, to identify:
        • dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
        • 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-)

  4. 2022

    No changes

  5. 2021

    Code changed

    • Use additional code

        • code to identify:
        • dementia with behavioral disturbance (F02.81)
        • dementia without behavioral disturbance (F02.80)

  6. 2020

    No changes

  7. 2019

    No changes

  8. 2018

    No changes

  9. 2017

    No changes

  10. 2016

    New code