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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.

Medications indicated for this condition

FDA labeling

Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.

Conditions mapped to this code

MedlinePlus · NIH
Parkinson's Disease

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

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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