ICD-10-CM
Q21.1: Atrial septal defect
A header, not a billable code. Bill a more specific code under it.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
- Kind
- Header. Not a billable code.
- Category
- Q21
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Codes under Q21.1
A header groups codes and is not billed. A billable code is one you can report.
- Q21Congenital malformations of cardiac septaHeader
- Q21.0Ventricular septal defectBillable
- Q21.10Atrial septal defect, unspecifiedBillable
- Q21.11Secundum atrial septal defectBillable
- Q21.12Patent foramen ovaleBillable
- Q21.13Coronary sinus atrial septal defectBillable
- Q21.14Superior sinus venosus atrial septal defectBillable
- Q21.15Inferior sinus venosus atrial septal defectBillable
- Q21.16Sinus venosus atrial septal defect, unspecifiedBillable
- Q21.19Other specified atrial septal defectBillable
- Q21.2Atrioventricular septal defectHeader
- Q21.20Atrioventricular septal defect, unspecified as to partial or completeBillable
- Q21.21Partial atrioventricular septal defectBillable
- Q21.22Transitional atrioventricular septal defectBillable
- Q21.23Complete atrioventricular septal defectBillable
- Q21.3Tetralogy of FallotBillable
- Q21.4Aortopulmonary septal defectBillable
- Q21.8Other congenital malformations of cardiac septaBillable
- Q21.9Congenital malformation of cardiac septum, unspecifiedBillable
It's the public CDC file. Check the current ICD-10-CM guidelines before you code.
Excludes1
Excludes1 means these codes are not reported together.
From Q21. A note on a category applies to every code under it.
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.