- Q20.-
- Congenital malformations of cardiac chambers and connections
- Q21.-
- Congenital malformations of cardiac septa
- Q22.-
- Congenital malformations of pulmonary and tricuspid valves
- Q23.-
- Congenital malformations of aortic and mitral valves
- Q24.-
- Other congenital malformations of heart
- Q25.-
- Congenital malformations of great arteries
- Q26.-
- Congenital malformations of great veins
- Q27.-
- Other congenital malformations of peripheral vascular system
- Q28.-
- Other congenital malformations of circulatory system
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