G21.8 OTHER SECONDARY PARKINSONISM

Code Information

  • Diagnosis Code: G21.8
  • Short Description: Other secondary parkinsonism
  • Long Description: Other secondary parkinsonism
  • Code Version: 2025 ICD-10-CM

The code G21.8 is VALID for claim submission

Code Classification

Synonyms

  • Infection causing parkinsonism
  • Infection causing parkinsonism
  • Parkinsonism co-occurrent and due to acute infection
  • Parkinsonism due to and following injury of head
  • Parkinsonism due to hereditary spastic paraplegia
  • Parkinsonism due to heredodegenerative disorder
  • Parkinsonism due to heredodegenerative disorder
  • Parkinsonism due to human immunodeficiency virus infection
  • Parkinsonism due to mass lesion of brain
  • Parkinsonism due to prion disease
  • Parkinsonism following infection
  • Parkinsonism following infection
  • Parkinsonism following Mycoplasma infection
  • Parkinsonism with calcification of basal ganglia

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
G21.8 Right Arrow 332.1 Secondary parkinsonism
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
G21 Secondary parkinsonism
G21.0 Malignant neuroleptic syndrome
G21.1 Other drug-induced secondary parkinsonism
G21.11 Neuroleptic induced parkinsonism
G21.19 Other drug induced secondary parkinsonism
G21.2 Secondary parkinsonism due to other external agents
G21.3 Postencephalitic parkinsonism
G21.4 Vascular parkinsonism
G21.9 Secondary parkinsonism, unspecified
This page was last updated on: 10/1/2025
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