Q03 ICD-10-CM Code: Congenital hydrocephalus
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
Q03Congenital hydrocephalus
ICD-10-CM diagnosis code · United States clinical modification
Where Q03 sits
- 1
Chapter 17
Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- 2
Section
Congenital malformations of the nervous system (Q00-Q07)
- 3
Category Q03
Congenital hydrocephalus
- 4
Code Q03
Congenital hydrocephalus
Codes under Q03
Q03 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for Q03.
Code first
No “code first” instruction is listed for Q03.
Use additional code
No “use additional code” instruction is listed for Q03.
Excludes1
Conditions that should not be reported together with this code.
- 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)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for Q03.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code Q03 mean?
Q03 is the FY 2027 U.S. ICD-10-CM code for “Congenital hydrocephalus.”
Is Q03 a billable or specific ICD-10-CM code?
No. Q03 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is Q03 located in ICD-10-CM?
Q03 is listed in Chapter 17, Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1), within Congenital malformations of the nervous system (Q00-Q07) (Q00–Q07), under category Q03, Congenital hydrocephalus.
What coding notes are listed for Q03?
No inclusion terms are listed for Q03 in this reference record. No code-first instruction is listed. Excludes1 notes: 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). No Excludes2 note is listed.