Groundbreaking: First-Ever HCC RAF Score Accessible Through REST API
First-Ever HCC RAF Score Accessible Through REST API
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ICD-10-CM Codes G00-G99 G20-G26 G21

ICD-10-CM Diagnosis Code G21

Secondary parkinsonism

Go Back to Chapter - G00-G99 | Section - G20-G26 Go back

Excludes-1 for G21:

  • Huntington's disease (G10)

  • neurocognitive disorder with Lewy bodies (G31.83)

  • Shy-Drager syndrome (G90.3)

  • syphilitic Parkinsonism (A52.19)

Codes Hierarchy:

    • G21  Secondary parkinsonism
      • G21.0  Malignant neuroleptic syndrome
      • G21.1 Other drug-induced secondary parkinsonism
        • 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