ICD-10-CM · Chapter 6 · G00-G99
G20 Parkinson's disease
Includes
- Hemiparkinsonism
- Idiopathic Parkinsonism or Parkinson's disease
- Paralysis agitans
- Primary Parkinsonism or Parkinson's disease
Use Additional Code
- code, if applicable, to identify:
- dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
- dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
- dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
- dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
- dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
- mild neurocognitive disorder due to known physiological condition (F06.7-)
Subcodes
Each subcode links to a detail page with full clinical annotations.
| Code | Description | Billable |
|---|---|---|
| G20..A | Parkinson's disease without dyskinesia | No |
| G20..A1 | Parkinson's disease without dyskinesia, without mention of fluctuations | Yes |
| G20..A2 | Parkinson's disease without dyskinesia, with fluctuations | Yes |
| G20..B | Parkinson's disease with dyskinesia | No |
| G20..B1 | Parkinson's disease with dyskinesia, without mention of fluctuations | Yes |
| G20..B2 | Parkinson's disease with dyskinesia, with fluctuations | Yes |
| G20..C | Parkinsonism, unspecified | Yes |
Plain-language term for this code
The following entry in the US Medical Glossary corresponds to ICD-10-CM category G20:
- Parkinson's Disease — Enfermedad de Parkinson
Last reviewed: September 2026