G21 – Secondary parkinsonism
Coding Notes
Active
Non-billable / Non-specific, not valid for HIPAA-covered transactions
Type 1 Excludes
dementia with Parkinsonism (G31.83)
Huntington's disease (G10)
Shy-Drager syndrome (G90.3)
syphilitic Parkinsonism (A52.19)
Child Codes
Sibling Codes
View in Tabular
| Code | Title |
|---|---|
| G00-G99 | Diseases of the nervous system (G00-G99) |
| G20-G26 | Extrapyramidal and movement disorders (G20-G26) |
| G21 |
Secondary parkinsonism
Type 1 Excludes
dementia with Parkinsonism (G31.83)
Huntington's disease (G10)
Shy-Drager syndrome (G90.3)
syphilitic Parkinsonism (A52.19)
|
| 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 |
| G21.8 | Other secondary parkinsonism |
| G21.9 | Secondary parkinsonism, unspecified |