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Congenital malformations of cardiac septa Q21- >

Type 1 Excludes
  • acquired cardiac septal defect (I51.0)
Clinical Information
  • A congenital disorder characterized by the presence of an abnormal communication between the atria or the ventricles of the heart due to defects in the cardiac septum.
  • Abnormalities in any part of the heart septum resulting in abnormal communication between the left and the right chambers of the heart. The abnormal blood flow inside the heart may be caused by defects in the atrial septum, the ventricular septum, or both.
  • Defects in the cardiac septa, resulting in abnormal communications between the opposite chambers of the heart that exist at, and usually before, birth regardless of their causation.
Q21 Congenital malformations of cardiac septa
Q21.0 is a specific ICD-10-CM diagnosis code Q21.0 Ventricular septal defect
Q21.1 is a specific ICD-10-CM diagnosis code Q21.1 Atrial septal defect
Q21.2 is a specific ICD-10-CM diagnosis code Q21.2 Atrioventricular septal defect
Q21.3 is a specific ICD-10-CM diagnosis code Q21.3 Tetralogy of Fallot
Q21.4 is a specific ICD-10-CM diagnosis code Q21.4 Aortopulmonary septal defect
Q21.8 is a specific ICD-10-CM diagnosis code Q21.8 Other congenital malformations of cardiac septa
Q21.9 is a specific ICD-10-CM diagnosis code Q21.9 Congenital malformation of cardiac septum, unspecified