ICD-10-CM > Q00-QA0 > Q00-Q07 > Q03 Q03 Congenital hydrocephalus Non-Billable/Non-Specific Includes hydrocephalus in newborn Type 1 Excludes 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) Codes Q03.0Malformations of aqueduct of SylviusQ03.1Atresia of foramina of Magendie and LuschkaQ03.8Other congenital hydrocephalusQ03.9Congenital hydrocephalus, unspecified