Secondary parkinsonism - G21
Excludes1: It indicates that the conditions described by two codes cannot occur together in the same patient. These codes are mutually exclusive.
Type 1 Excludes:
- dementia with Parkinsonism (G31.83)
- Huntington's disease (G10)
- Shy-Drager syndrome (G90.3)
- syphilitic Parkinsonism (A52.19)
These ranges represents subcategories of Secondary parkinsonism. The "G21" signifies that these are the diseases within this broad category.
Codes:
- 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