G21.1
⚠ Non-billable
Other drug-induced secondary parkinsonism
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G21.1
System
ICD-10-CM
Billable
No — use specific code
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 G21.1?
ICD-10-CM code G21.1 represents Other drug-induced secondary parkinsonism. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G21.1 billable?
No. G21.1 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is G21.1 in?
G21.1 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G21 category
G21
Secondary parkinsonism
Non-billable
G21.0
Malignant neuroleptic syndrome
Billable
G21.2
Secondary parkinsonism due to other external agents
Billable
G21.3
Postencephalitic parkinsonism
Billable
G21.4
Vascular parkinsonism
Billable
G21.8
Other secondary parkinsonism
Billable
G21.9
Secondary parkinsonism, unspecified
Billable
G21.11
Neuroleptic induced parkinsonism
Billable
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →