ICD-10-CM > Q00-QA0 > Q20-Q28 > Q21 > Q21.1 > Q21.11 Q21.11 Secundum atrial septal defect Billable/Specific Copy Code Copy Description Applicable To Fenestrated atrial septumPatent or persistent ostium secundum defect (type II)
ICD-10 Fast ICD-10 Fast