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ICD-10-CM category

G21: Secondary parkinsonism

9 subcodes · 8 billable · Look up any code with the ICD-10 search

Codes under G21 (Secondary parkinsonism). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

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

More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees

Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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