Q21.12 Patent foramen ovale - ICD-10-CM Diagnosis Codes. A condition in which the foramen ovale in the atrial septum fails to close shortly after birth.Patent foramen ovale. Q2113, CC, 54 codes, Coronary sinus atrial septal defect. Q2113, Coronary sinus atrial septal defect. ICD-10 Procedure Codes. ICD-10-PCS procedure codes: Code Description. 02U53JZ. Patent or persistent: foramen ovale; ostium secundum defect (type II). Sinus venosus defect. Use code 93581 for percutaneous closure with CardioSeal device implantation.