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G21.2 - Secondary parkinsonism due to other external agents


The ICD 10 Code for Secondary parkinsonism due to other external agents is listed as G21.2.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field Value
Diagnosis Code: G21.2
Description: Secondary parkinsonism due to other external agents
  • Code first (T51-T65) to identify external agent
Diagnostic Related Groups
(MS-DRG v30.0)
056 - Degenerative Nervous System Disorders W Mcc
057 - Degenerative Nervous System Disorders W/o Mcc
Chapter Diseases of the nervous system (G00-G99)
Block Extrapyramidal and movement disorders (G20-G26)
Parent G21 - Secondary parkinsonism
ICD-9-CM Diagnosis Codes General Equivalence Mappings (GEMS):
ICD 9 Dx Code: 332.1 - Secondary parkinsonism (approximate)
ICD-10-CM Siblings (same level / similar specificity) of G21.2:
G21.0 - Malignant neuroleptic syndrome
G21.1 - Other drug-induced secondary parkinsonism
G21.3 - Postencephalitic parkinsonism
G21.4 - Vascular parkinsonism
G21.8 - Other secondary parkinsonism
G21.9 - Secondary parkinsonism, unspecified