G21 Secondary parkinsonism
ICD-10-CM category G21 sits in Chapter 6 (Diseases of the nervous system, G00-G99). It contains 8 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Subcategories
G21.1 Other drug-induced secondary parkinsonism
Billable codes in G21
| Code | Description |
|---|---|
G21.0 | Malignant neuroleptic syndrome |
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 |
G21.8 | Other secondary parkinsonism |
G21.9 | Secondary parkinsonism, unspecified |
Search within ICD-10-CM for G21 and related codes
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