ICD-10-CM · Chapter 6 · G00–G99
G20.A1
Parkinson's disease without dyskinesia, without mention of fluctuations
Diseases of the nervous system
Quick facts
- Code
- G20.A1
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 6 — Diseases of the nervous system
- Category
- G20 — Parkinson's disease
- Specificity
- 5 characters
How coders use this code
ICD-10-CM G20.A1 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of parkinson's disease without dyskinesia, without mention of fluctuations. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in G20
- G20Parkinson's disease
- G20.AParkinson's disease without dyskinesia
- G20.A2Parkinson's disease without dyskinesia, with fluctuations
- G20.BParkinson's disease with dyskinesia
- G20.B1Parkinson's disease with dyskinesia, without mention of fluctuations
- G20.B2Parkinson's disease with dyskinesia, with fluctuations
- G20.CParkinsonism, unspecified
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