Q21.12 Patent foramen ovale - ICD-10-CM Diagnosis Codes. Patent foramen ovale.Q2113, CC, 54 codes, Coronary sinus atrial septal defect. Atrial septal defect, unspecified. Q2111, Secundum atrial septal defect. This document addresses the transcatheter closure of patent foramen ovale and transcatheter or open left atrial appendage (LAA) closure. Patent or persistent ostium secundum defect (type II). 745.5. Q21.12. (m) Patent foramen ovale. 33641 - Repair atrial septal defect with cardiopulmonary bypass, with or without patch. ICD 10 code for Personal history of (corrected) congenital malformations of heart and circulatory system.