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Diagnosis Code

G21.3 POSTENCEPHALITIC PARKINSONISM


Code Information

Diagnosis Code: G21.3

Short Description: Postencephalitic parkinsonism

Long Description: Postencephalitic parkinsonism

The code G21.3 is VALID for claim submission

Code Classification:

  • Diseases of the nervous system (G00–G99)
    • Extrapyramidal and movement disorders (G20-G26)
      • Secondary parkinsonism (G21)
        • G21.3 Postencephalitic parkinsonism

Code Version: 2022 ICD-10-CM


Synonyms

  • Postencephalitic parkinsonism
  • Post-encephalitic syndrome

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
G21.3 Right Arrow 332.1 Secondary parkinsonism

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
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
G21.4 Vascular parkinsonism
G21.8 Other secondary parkinsonism
G21.9 Secondary parkinsonism, unspecified

This page was last updated on: 10/1/2023

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