Patent foramen ovale. Persistent foramen ovale.Q21.12 Patent foramen ovale - ICD-10-CM Diagnosis Codes. Q2113, CC, 54 codes, Coronary sinus atrial septal defect. A condition in which the foramen ovale in the atrial septum fails to close shortly after birth. Large congenital atrial septal defect(ASD) and patentforamen ovale (PFO) Q21.1 19. Transoesophageal echo detected a patent foramen ovale with righttoleft shunt and aneurysmal septum. The echocardiograms considered normal included 45 infants with a persistent foramen ovale and 16 with a minimum patent ductus arteriosus. Patent Foramen Ovale (PFO). Pericardial Disease. Pericarditis.