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Diagnosis Code

G21.0 MALIGNANT NEUROLEPTIC SYNDROME


Code Information

Diagnosis Code: G21.0

Short Description: Malignant neuroleptic syndrome

Long Description: Malignant neuroleptic syndrome

The code G21.0 is VALID for claim submission

Code Classification:

  • Diseases of the nervous system (G00–G99)
    • Extrapyramidal and movement disorders (G20-G26)
      • Secondary parkinsonism (G21)
        • G21.0 Malignant neuroleptic syndrome

Code Version: 2022 ICD-10-CM


Synonyms

  • Neuroleptic malignant syndrome

References to Index of Diseases and Injuries

The code G21.0 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Type 1 Excludes Notes:
    • neuroleptic induced parkinsonism (@G21.11*)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
G21.0 Right Arrow 333.92 Neuroleptic malgnt synd

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
G21.1 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

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

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