Q21.2
Atrioventricular septal defect
Q21.2 is a non-billable ICD-10-CM code header for atrioventricular septal defect. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Q21.20 Atrioventricular septal defect, unspecified as to partial or complete; Q21.21 Partial atrioventricular septal defect; Q21.22 Transitional atrioventricular septal defect and Q21.23 Complete atrioventricular septal defect. Its coding notes include 1 Excludes1 entry and 1 Excludes2 entry.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Chapter 17 codes can be used for life. Manifestations that are an inherent part of a specifically coded anomaly are not coded separately. A corrected malformation is reported with a personal history code.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (1 note)
- inborn errors of metabolism (E70-E88)
Inclusion terms
Conditions classified to this code.
- Atrioventricular canal defect
- Endocardial cushion defect
- Ostium primum atrial septal defect (type I)
Notes
Also from chapter/block level (1 note)
- Codes from this chapter are not for use on maternal records