Congenital malformations of the circulatory system

Q20-Q28

This section covers 118 ICD-10-CM codes (Q20-Q28) for congenital malformations of the circulatory system, including congenital malformations of cardiac chambers and connections, congenital malformations of cardiac septa, and congenital malformations of pulmonary and tricuspid valves. 102 of these are billable codes usable on a claim; the rest are non-billable header categories that require a more specific child code.