Category G21
Secondary parkinsonism
Clinical Classification Guidelines
Specific Diagnosis Codes
Malignant neuroleptic syndrome
G21.0
Other drug-induced secondary parkinsonism
G21.1
Neuroleptic induced parkinsonism
G21.11
Other drug induced secondary parkinsonism
G21.19
Secondary parkinsonism due to other external agents
G21.2
Postencephalitic parkinsonism
G21.3
Vascular parkinsonism
G21.4
Other secondary parkinsonism
G21.8
Secondary parkinsonism, unspecified
G21.9