G21.2
ICD-10BillableSecondary parkinsonism due to other external agents
Official ICD-10-CM descriptor (FY2026)
Secondary parkinsonism due to other external agents
G21.2 is valid for submission on a claim — CMS flags it as a billable, specific code.
Code first
Sequence the underlying condition before this code.
- (T51-T65) to identify external agent
Related codes in G21
Where this code sits
- Parent code
- G21
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.