Secondary parkinsonism - G21

 Type 1 Excludes

• dementia with Parkinsonism (G31.83)
• Huntington's disease (G10)
• Shy-Drager syndrome (G90.3)
• syphilitic Parkinsonism (A52.19)

 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