ICD-10-CM Book 2025 Edition

Chapters ICD-10-CM Book Table of Content /
chapter 6 G00-G99 Diseases of the nervous system /
G20-G26 Extrapyramidal and movement disorders /
G21 Secondary parkinsonism

  Billable ICD-10-CM Code G21.0
G21.0
Malignant neuroleptic syndrome
useAdditionalCode
code for adverse effect, if applicable, to identify drug (T43.3X5, T43.4X5, T43.505, T43.595)
excludes1
neuroleptic induced parkinsonism (G21.11)