G20.A1

✓ Billable

Parkinson's disease without dyskinesia, without mention of fluctuations

Diseases of the nervous system (G00-G99)

Also Known As

Parkinson's disease NOSParkinson's disease without dyskinesia, without mention of OFF episodes

✅ No additional coding notes for G20.A1

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Code Information

CodeG20.A1

BillableYes

ParentG20.A

CategoryDiseases of the nervous system (G00-G99)

Excludes10 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)