InnovaRx Innova Health Strategies
Pricing Sign in

Q21.20

Atrioventricular septal defect, unspecified as to partial or complete

Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 3 more specific codes sit alongside it. Worth checking whether the documentation supports one of them.
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 6
Q21.2code
Inclusion terms
  • Atrioventricular canal defect
  • Endocardial cushion defect
  • Ostium primum atrial septal defect (type I)
Q21.20code
Inclusion terms
  • Atrioventricular canal, NOS
  • Endocardial cushion defect NOS
  • Ostium primum atrial septal defect (type I) NOS
Index entries leading here 7
  • Defect, defective Q89.9
  • Canal — see also condition
  • Persistence, persistent (congenital)
  • Imperfect
    • closure (congenital)
      • atrioventricular ostium Q21.20
  • Single
  • Endocardium, endocardial — see also condition
  • Ostium
    • primum (arteriosum) (defect) (persistent) Q21.20
Alongside this code 3 same parent — Q21.2
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

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.