| Full description | Atrioventricular septal defect, unspecified as to partial or complete |
| Billable | Yes |
| Chapter | Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1) |
| Section | Congenital malformations of the circulatory system (Q20-Q28) |
| Parent code | Q21.2 — Atrioventricular septal defect |