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Ch. VI
ICD-10
Ch. VI
G21
G21
3-char group
Secondary parkinsonism
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⇄ Primary-code rule changed vs QĐ4469
Coding rules (TT06)
●
Avoid — more specific 4-5 char codes exist (see below)
Codes within G21
G21.0
Malignant neuroleptic syndrome
G21.1
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
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