G21: Secondary parkinsonism excludes1 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 |
| G21.2: 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 |