G21 — ICD-10-CM Diagnosis Codes

• G21 Secondary parkinsonism
• G21.0 Malignant neuroleptic syndrome billable
• G21.1 Other drug-induced secondary parkinsonism
• G21.11 Neuroleptic induced parkinsonism billable
• G21.19 Other drug induced secondary parkinsonism billable
• G21.2 Secondary parkinsonism due to other external agents billable
• G21.3 Postencephalitic parkinsonism billable
• G21.4 Vascular parkinsonism billable
• G21.8 Other secondary parkinsonism billable
• G21.9 Secondary parkinsonism, unspecified billable