Transitional atrioventricular septal defect

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2023 onwards.

What has happened to this code

Every change the publisher made, from 2023 to now.

FY2023 Added to the code set Transitional atrioventricular septal defect

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from Q21 Congenital malformations of cardiac septa

Excludes1 - never coded here

acquired cardiac septal defect (I51.0)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Deformity > atrial septal
Deformity > heart > septum > auricular
Defect, defective > septal NOS > atrial
Canal > atrioventricular > intermediate
Canal > atrioventricular > transitional
Defect, defective > cushion, endocardial > intermediate
Defect, defective > cushion, endocardial > transitional
Defect, defective > atrioventricular > septal > intermediate
Defect, defective > atrioventricular > septal > transitional
Defect, defective > atrial septal > ostium primum type > with > separate atrioventricular valves > and small or restrictive inlet VSD

Codes in the same group

Code	Description	Status
Q21.20	Atrioventricular septal defect, unspecified as to partial or complete	Valid
Q21.21	Partial atrioventricular septal defect	Valid
Q21.23	Complete atrioventricular septal defect	Valid