2025
ICD-10-CM
Diagnosis
Code

G21 Secondary parkinsonism

  • Non-billable
  • 2016–2025

G21 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Secondary parkinsonism.

Type 1 excludes

  • Huntington's disease (G10)

  • Neurocognitive disorder with Lewy bodies (G31.83)

  • Shy-Drager syndrome (G90.3)

  • Syphilitic Parkinsonism (A52.19)

Codes

Versions

  1. 2025

    Code changed

    • Type 1 excludes

        • dementia with Parkinsonism (G31.83)
        • Huntington's disease (G10)
        • Shy-Drager syndrome (G90.3)
        • syphilitic Parkinsonism (A52.19)
        • Huntington's disease (G10)
        • neurocognitive disorder with Lewy bodies (G31.83)
        • Shy-Drager syndrome (G90.3)
        • syphilitic Parkinsonism (A52.19)

  2. 2024

    No changes

  3. 2023

    No changes

  4. 2022

    No changes

  5. 2021

    No changes

  6. 2020

    No changes

  7. 2019

    No changes

  8. 2018

    No changes

  9. 2017

    No changes

  10. 2016

    New code