G21.2 SECONDARY PARKINSONISM DUE TO OTHER EXTERNAL AGENTS

Code Information

  • Diagnosis Code: G21.2
  • Short Description: Secondary parkinsonism due to other external agents
  • Long Description: Secondary parkinsonism due to other external agents
  • Code Version: 2025 ICD-10-CM

The code G21.2 is VALID for claim submission

Code Classification

Synonyms

  • Carbon monoxide encephalopathy
  • Carbon monoxide-induced parkinsonism
  • MPTP-induced parkinsonism
  • Parkinsonism caused by carbon disulfide
  • Parkinsonism caused by cyanide
  • Pesticide-induced Parkinsonism
  • Toxin-induced parkinsonism

References to Index of Diseases and Injuries

The code G21.2 has the following ICD-10-CM references to the Index of Diseases and Injuries

  • Code First:
    • (@T51*-@T65*) to identify external agent

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
G21.2 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
G21.3 Postencephalitic parkinsonism
G21.4 Vascular parkinsonism
G21.8 Other secondary parkinsonism
G21.9 Secondary parkinsonism, unspecified
This page was last updated on: 10/1/2025
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