Q21 Congenital malformations of cardiac septa
ICD-10-CM category Q21 sits in Chapter 17 (Congenital malformations, deformations and chromosomal abnormalities, Q00-Q99). It contains 17 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Subcategories
Q21.1 Atrial septal defectQ21.2 Atrioventricular septal defect
Billable codes in Q21
| Code | Description |
|---|---|
Q21.0 | Ventricular septal defect |
Q21.10 | Atrial septal defect, unspecified |
Q21.11 | Secundum atrial septal defect |
Q21.12 | Patent foramen ovale |
Q21.13 | Coronary sinus atrial septal defect |
Q21.14 | Superior sinus venosus atrial septal defect |
Q21.15 | Inferior sinus venosus atrial septal defect |
Q21.16 | Sinus venosus atrial septal defect, unspecified |
Q21.19 | Other specified atrial septal defect |
Q21.20 | Atrioventricular septal defect, unspecified as to partial or complete |
Q21.21 | Partial atrioventricular septal defect |
Q21.22 | Transitional atrioventricular septal defect |
Q21.23 | Complete atrioventricular septal defect |
Q21.3 | Tetralogy of Fallot |
Q21.4 | Aortopulmonary septal defect |
Q21.8 | Other congenital malformations of cardiac septa |
Q21.9 | Congenital malformation of cardiac septum, unspecified |
Search within ICD-10-CM for Q21 and related codes
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