Q03.9

ICD-10Billable

Congenital hydrocephalus, unspecified

Official ICD-10-CM descriptor (FY2026)

Congenital hydrocephalus, unspecified

Q03.9 is valid for submission on a claim — CMS flags it as a billable, specific code.

Related codes in Q03

Where this code sits

Chapter: 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)
Block: Congenital malformations of the nervous system (Q00-Q07)
Parent code: Q03

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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.