Q03.0 Malformations of aqueduct of Sylvius
The ICD-10-CM code for Malformations of aqueduct of Sylvius is Q03.0 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- Q00-Q07: Congenital malformations of the nervous system (Q00-Q07)
- Category Q03
- 5 codes (4 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to Q03.0:
- Stricture › aqueduct of Sylvius (congenital)
- Stenosis, stenotic (cicatricial) › aqueduct of Sylvius (congenital)
- Hydrocephalus (acquired) (external) (internal) (malignant) (recurrent) › aqueduct Sylvius stricture
- Septum, septate (congenital) › aqueduct of Sylvius
- Anomaly, anomalous (congenital) (unspecified type) › aqueduct of Sylvius
- Atresia, atretic › aqueduct of Sylvius
- Occlusion, occluded › aqueduct of Sylvius › congenital
- Obstruction, obstructed, obstructive › aqueduct of Sylvius › congenital
Inclusion Terms
- Anomaly of aqueduct of Sylvius
- Obstruction of aqueduct of Sylvius, congenital
- Stenosis of aqueduct of Sylvius
U.S. Hospital Utilization
- An estimated 1,745 U.S. inpatient stays in 2023 included Q03.0 among the documented diagnoses.
- 470 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
POA indicator for congenital conditions/anomalies and Q00-Q99 exceptionCongenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. Congenital conditions are always considered present on admission.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026