Is G91.1 a billable code?
Yes. G91.1 is a billable ICD-10-CM code and can be used on claims and superbills for dates of service from October 1, 2026 to September 30, 2027.
ICD-10-CM FY2027 diagnosis code
G91.1: Obstructive hydrocephalus
Billable codeValid for dates of service October 1, 2026 to September 30, 2027
G91.1 is a billable ICD-10-CM diagnosis code for obstructive hydrocephalus. It is specific enough to use on an insurance claim, a superbill or a Good Faith Estimate.
Superbill GeneratorStart a superbill with G91.1 already added.Good Faith EstimateStart a cost estimate with G91.1 already added.CMS-1500 Claim FormFill a claim form with G91.1 in box 21.
G91.1 questions
What does G91.1 mean?
G91.1 is the ICD-10-CM code for Obstructive hydrocephalus. It is in chapter 6, Diseases of the nervous system (G00-G99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.