G91.4

ICD-10Billable

Hydrocephalus in diseases classified elsewhere

Official ICD-10-CM descriptor (FY2026)

Hydrocephalus in diseases classified elsewhere

G91.4 is valid for submission on a claim — CMS flags it as a billable, specific code.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • hydrocephalus due to congenital toxoplasmosis (P37.1)

Code first

Sequence the underlying condition before this code.

  • underlying condition, such as:
  • congenital syphilis (A50.4-)
  • neoplasm (C00-D49)
  • plasminogen deficiency (E88.02)

Related codes in G91

Where this code sits

Parent code
G91

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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