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Q21.21

Partial atrioventricular septal defect

Billable 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 9
Q21.21code
Inclusion terms
  • Incomplete atrioventricular canal
  • Incomplete atrioventricular septal defect
  • Incomplete endocardial cushion defect
  • Ostium primum atrial septal defect (type I) with separate atrioventricular valves
  • Partial atrioventricular canal
  • Partial endocardial cushion defect
Q21.2code
Inclusion terms
  • Atrioventricular canal defect
  • Endocardial cushion defect
  • Ostium primum atrial septal defect (type I)
Index entries leading here 3
  • Defect, defective Q89.9
  • Canal — see also condition
  • Incomplete — see also condition
Alongside this code 3 same parent — Q21.2
Q21.20 Atrioventricular septal defect, unsp as to part or complete 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

RX08HCC191

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

This code

Billable
yes
Code set
FY2026
Parent
Q21.2
Block
Q20-Q28
Siblings
3

Present FY2024–FY2027.