Q03 ICD-10-CA category: Congenital hydrocephalus
Q03 isn’t a code on its own. Choose one of the 4 codes beneath it, the one the documentation supports.
Official description
Q03Congenital hydrocephalus
ICD-10-CA · Canada
Codes in Q03
Q03 isn’t a code on its own. Open the code that matches what the note documents.
Notes for Q03
As CIHI prints them, with any note Q03 takes from the headings above it.
Includes
- Hydrocephalus in newborn
Excludes
Conditions classified elsewhere.
- Arnold-Chiari syndrome (Q07.0)hydrocephalus:• acquired NOS (G91.-)• acquired, of newborn (P91.7)• due to congenital toxoplasmosis (P37.1)• with spina bifida (Q05.0-Q05.4)
- Inborn errors of metabolism (E70-E90)From Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Where Q03 sits
- 1ChapterChapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- 2Block Q00-Q07Congenital malformations of the nervous system
- 3Category Q03Congenital hydrocephalus
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is Q03 a valid ICD-10-CA code?
No. Q03 (Congenital hydrocephalus) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 4 codes; record the one the documentation supports.
Where is Q03 in ICD-10-CA?
Q03 sits under Q00-Q07 Congenital malformations of the nervous system, within Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).
What coding notes apply to Q03?
ICD-10-CA lists Includes, Excludes notes for Q03, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.