Category G21
Non-Billable Category
FY2027 Dataset
G21: Secondary parkinsonism
Parent Chapter: Chapter 6: Diseases of the nervous system
Notice on Coding Specificity: Category G21 is a 3-character heading and cannot be reported directly on healthcare claims. You must assign one of the specific child codes listed below.
Specific Child Codes in Category G21
| Code | Official Descriptor | Status | Action |
|---|---|---|---|
| G21.0 | Malignant neuroleptic syndrome | Billable Code | View Code |
| G21.11 | Neuroleptic induced parkinsonism | Billable Code | View Code |
| G21.19 | Other drug induced secondary parkinsonism | Billable Code | View Code |
| G21.2 | Secondary parkinsonism due to other external agents | Billable Code | View Code |
| G21.3 | Postencephalitic parkinsonism | Billable Code | View Code |
| G21.4 | Vascular parkinsonism | Billable Code | View Code |
| G21.8 | Other secondary parkinsonism | Billable Code | View Code |
| G21.9 | Secondary parkinsonism, unspecified | Billable Code | View Code |
| G21 | Secondary parkinsonism | Non-Billable | View Code |
| G21.1 | Other drug-induced secondary parkinsonism | Non-Billable | View Code |