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Q21.2

Atrioventricular septal defect

Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 1 never code together
Q21code
Excludes1
  • acquired cardiac septal defect (I51.0)I51.0

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Instructional notes 3
Q21.2code
Inclusion terms
  • Atrioventricular canal defect
  • Endocardial cushion defect
  • Ostium primum atrial septal defect (type I)
Index entries leading here filed at null

No alphabetic index entry points at this code.

Alongside this code 6 same parent — Q21
Q21.0 Ventricular septal defect Q21.1 Atrial septal defect category 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
Subordinate codes 4
Q21.20 Atrioventricular septal defect, unsp as to part or complete Q21.21 Partial atrioventricular septal defect Q21.22 Transitional atrioventricular septal defect Q21.23 Complete atrioventricular septal defect
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
no
Code set
FY2026
Parent
Q21
Block
Q20-Q28
Siblings
6
Subordinate
4

Present FY2024–FY2027.