ICD-10-CM > Q00-QA0 > Q00-Q07 > Q03 > Q03.0 Q03.0 Malformations of aqueduct of Sylvius Billable/Specific Copy Code Copy Description Applicable To Anomaly of aqueduct of SylviusObstruction of aqueduct of Sylvius, congenitalStenosis of aqueduct of Sylvius