G21 Non-Billable Code
Secondary parkinsonism
Chapter Classification
Chapter 6
Diseases of the nervous system (G00-G99)
Section Detail
G20-G26
Extrapyramidal and movement disorders (G20-G26)
Coding Guidelines & Notes
excludes1
- Huntington's disease (G10)
- neurocognitive disorder with Lewy bodies (G31.83)
- Shy-Drager syndrome (G90.3)
- syphilitic Parkinsonism (A52.19)
More Specific Diagnosis Codes
This code is not billable as it requires a higher level of specificity. Select a more specific code below.
- G21.0 - Malignant neuroleptic syndrome Billable
- G21.1 - Other drug-induced secondary parkinsonism
- G21.2 - Secondary parkinsonism due to other external agents Billable
- G21.3 - Postencephalitic parkinsonism Billable
- G21.4 - Vascular parkinsonism Billable
- G21.8 - Other secondary parkinsonism Billable
- G21.9 - Secondary parkinsonism, unspecified Billable
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