ICD-10-CM Codes 2026 (USA)

• G21.3	Postencephalitic parkinsonism

• G21.0	Malignant neuroleptic syndrome
  G21.11	Neuroleptic induced parkinsonism
  G21.19	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

Created by Peter Blahut, MD