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Q03

Non-billable

Congenital hydrocephalus

Q03 is the ICD-10-CM code for Congenital hydrocephalus. It is a non-billable category code — use a more specific child code such as Q03.0 for billing.

Status
Header (non-billable)
Chapter
Q00-Q99
Subcodes
4
Edition
FY2026

Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities

Includes

  • •hydrocephalus in newborn

Excludes1 — not coded here

  • •Arnold-Chiari syndrome, type II (Q07.0-)
  • •acquired hydrocephalus (G91.-)
  • •hydrocephalus due to congenital toxoplasmosis (P37.1)
  • •hydrocephalus with spina bifida (Q05.0-Q05.4)

Frequently asked questions

What is ICD-10 code Q03?
Q03 is the ICD-10-CM code for "Congenital hydrocephalus". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
Is Q03 a billable code?
No — Q03 is a non-billable header code. Use a more specific child code (such as Q03.0) for billing.
What are the subcodes of Q03?
Q03 has 4 more specific child codes, including Q03.0, Q03.1, Q03.8.
What is excluded from Q03?
Excludes1 (not coded here): Arnold-Chiari syndrome, type II (Q07.0-); acquired hydrocephalus (G91.-); hydrocephalus due to congenital toxoplasmosis (P37.1); hydrocephalus with spina bifida (Q05.0-Q05.4).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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