ICD-10-CM · Chapter 6 · G00–G99
G20
Parkinson's disease
Diseases of the nervous system
Heads up:this is a parent code. It's typically not directly billable — you need to drill down to a more specific child code (one with additional digits) to use on a claim.
Quick facts
- Code
- G20
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 6 — Diseases of the nervous system
- Category
- G20
- Specificity
- 3 characters
How coders use this code
ICD-10-CM G20 is a category (header) for parkinson's disease. It is generally not reported directly on a claim — coders drill down to a more specific child code (one with additional characters) that matches the documentation. Use the related codes below to find the billable code that fits, and verify against the annual NCHS/CMS guidelines.
Related codes in G20
- G20.AParkinson's disease without dyskinesia
- G20.A1Parkinson's disease without dyskinesia, without mention of fluctuations
- 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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