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G21Secondary parkinsonism

Non-Billable/Non-Specific

Type 1 Excludes

  • Huntington's disease (G10)
  • neurocognitive disorder with Lewy bodies (G31.83)
  • Shy-Drager syndrome (G90.3)
  • syphilitic Parkinsonism (A52.19)

Codes

  • G21.0Malignant neuroleptic syndrome
  • G21.1Other drug-induced secondary parkinsonism
    • G21.11Neuroleptic induced parkinsonism
    • G21.19Other 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