1. Q21 Congenital malformations of cardiac septa

    Excludes1

    • acquired cardiac septal defect (I51.0)
    1. Q21.0 Ventricular septal defect

      Inclusion term(s):

      • Roger's disease
    2. Q21.1 Atrial septal defect

      Inclusion term(s):

      • Excludes 2: ostium primum atrial septal defect (type I) (Q21.20)
      1. Q21.10 Atrial septal defect, unspecified

      2. Q21.11 Secundum atrial septal defect

        Inclusion term(s):

        • Fenestrated atrial septum
        • Patent or persistent ostium secundum defect (type II)
      3. Q21.12 Patent foramen ovale

        Inclusion term(s):

        • Persistent foramen ovale
      4. Q21.13 Coronary sinus atrial septal defect

        Inclusion term(s):

        • Coronary sinus defect
        • Unroofed coronary sinus
      5. Q21.14 Superior sinus venosus atrial septal defect

        Inclusion term(s):

        • Superior vena cava type atrial septal defect
      6. Q21.15 Inferior sinus venosus atrial septal defect

        Inclusion term(s):

        • Inferior vena cava type atrial septal defect
      7. Q21.16 Sinus venosus atrial septal defect, unspecified

        Inclusion term(s):

        • Sinus venosus defect, NOS
      8. Q21.19 Other specified atrial septal defect

        Inclusion term(s):

        • Common atrium
        • Other specified atrial septal abnormality
    3. Q21.2 Atrioventricular septal defect

      Inclusion term(s):

      • Atrioventricular canal defect
      • Endocardial cushion defect
      • Ostium primum atrial septal defect (type I)
      1. Q21.20 Atrioventricular septal defect, unspecified as to partial or complete

        Inclusion term(s):

        • Atrioventricular canal, NOS
        • Endocardial cushion defect NOS
        • Ostium primum atrial septal defect (type I) NOS
      2. Q21.21 Partial atrioventricular septal defect

        Inclusion term(s):

        • Incomplete atrioventricular canal
        • Incomplete atrioventricular septal defect
        • Incomplete endocardial cushion defect
        • Ostium primum atrial septal defect (type I) with separate atrioventricular valves
        • Partial atrioventricular canal
        • Partial endocardial cushion defect
      3. Q21.22 Transitional atrioventricular septal defect

        Inclusion term(s):

        • Intermediate atrioventricular canal
        • Intermediate atrioventricular septal defect
        • Intermediate endocardial cushion defect
        • Ostium primum atrial septal defect (type I) with separate atrioventricular valves and a small or restrictive inlet VSD
        • Transitional atrioventricular canal
        • Transitional endocardial cushion defect
      4. Q21.23 Complete atrioventricular septal defect

        Inclusion term(s):

        • Common atrioventricular canal
        • Common atrioventricular septal defect
        • Common endocardial cushion defect
        • Ostium primum atrial septal defect (type I) with common atrioventricular valve and a moderate or larger inlet VSD
    4. Q21.3 Tetralogy of Fallot

      Inclusion term(s):

      • Ventricular septal defect with pulmonary stenosis or atresia, dextroposition of aorta and hypertrophy of right ventricle.
    5. Q21.4 Aortopulmonary septal defect

      Inclusion term(s):

      • Aortic septal defect
      • Aortopulmonary window
    6. Q21.8 Other congenital malformations of cardiac septa

      Inclusion term(s):

      • Eisenmenger's defect
      • Pentalogy of Fallot
    7. Q21.9 Congenital malformation of cardiac septum, unspecified

      Inclusion term(s):

      • Septal (heart) defect NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.