ICD-10 diagnosis code

G21 Secondary parkinsonism

G21 is the ICD-10 code for Secondary parkinsonism. It is a three-character category divided into 7 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block G20–G26 (Extrapyramidal and movement disorders) in Chapter VI, Diseases of the nervous system.

Code type: Category (3 characters)
Chapter: VI · G00–G99
Classification: WHO ICD-10, 2019 version

Subcodes of G21

G21 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

G21Sekundär parkinsonism

DenmarkICD-10-DK

DG21Sekundær parkinsonisme

FinlandICD-10-FI

G21Sekundaarinen parkinsonismi

GermanyICD-10-GM

G21Sekundäres Parkinson-Syndrom

FranceICD-10-FR

G21Syndrome parkinsonien secondaire

NetherlandsICD-10-NL

G21secundair parkinsonisme

Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.

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