ICD-10-CM · Chapter 6 · G00–G99
G21.2
Secondary parkinsonism due to other external agents
Diseases of the nervous system
Quick facts
- Code
- G21.2
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 6 — Diseases of the nervous system
- Category
- G21 — Secondary parkinsonism
- Specificity
- 4 characters
How coders use this code
ICD-10-CM G21.2 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of secondary parkinsonism due to other external agents. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in G21
- G21Secondary parkinsonism
- G21.0Malignant neuroleptic syndrome
- G21.1Other drug-induced secondary parkinsonism
- G21.11Neuroleptic induced parkinsonism
- G21.19Other drug induced secondary parkinsonism
- G21.3Postencephalitic parkinsonism
- G21.4Vascular parkinsonism
- G21.8Other secondary parkinsonism
- G21.9Secondary parkinsonism, unspecified
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