G20.C
✓ Billable
Parkinsonism, unspecified
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G20.C
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Nervous System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code G20.C?
ICD-10-CM code G20.C represents Parkinsonism, unspecified. It is a billable diagnosis code in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G20.C billable?
Yes. G20.C is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is G20.C in?
G20.C belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G20 category
G20
Parkinson's disease
Non-billable
G20.A
Parkinson's disease without dyskinesia
Non-billable
G20.B
Parkinson's disease with dyskinesia
Non-billable
G20.A1
Parkinson's disease without dyskinesia, without mention of fluctuations
Billable
G20.A2
Parkinson's disease without dyskinesia, with fluctuations
Billable
G20.B1
Parkinson's disease with dyskinesia, without mention of fluctuations
Billable
G20.B2
Parkinson's disease with dyskinesia, with fluctuations
Billable
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