G91.4
✓ Billable
Hydrocephalus in diseases classified elsewhere
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G91.4
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 G91.4?
ICD-10-CM code G91.4 represents Hydrocephalus in diseases classified elsewhere. It is a billable diagnosis code in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G91.4 billable?
Yes. G91.4 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is G91.4 in?
G91.4 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G91 category
G91
Hydrocephalus
Non-billable
G91.0
Communicating hydrocephalus
Billable
G91.1
Obstructive hydrocephalus
Billable
G91.2
(Idiopathic) normal pressure hydrocephalus
Billable
G91.3
Post-traumatic hydrocephalus, unspecified
Billable
G91.8
Other hydrocephalus
Billable
G91.9
Hydrocephalus, unspecified
Billable
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