G21

Non-Billable

Secondary parkinsonism

G21 should not be used for reimbursement purposes as there are multiple sub-diagnoses that fall under this code. Please refer to the sub-diagnoses below.

Related Diagnoses

  • 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
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