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G20.A

Non-billable

Parkinson's disease without dyskinesia

G20.A is the ICD-10-CM code for Parkinson's disease without dyskinesia. It is a non-billable category code — use a more specific child code such as G20.A1 for billing.

Status
Header (non-billable)
Chapter
G00-G99
Parent
G20
Subcodes
2
Edition
FY2026

G00-G99 Diseases of the nervous system

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code G20.A?
G20.A is the ICD-10-CM code for "Parkinson's disease without dyskinesia". It falls under G00-G99 Diseases of the nervous system.
Is G20.A a billable code?
No — G20.A is a non-billable header code. Use a more specific child code (such as G20.A1) for billing.
What are the subcodes of G20.A?
G20.A has 2 more specific child codes, including G20.A1, G20.A2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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