ICD-10-CM › Q00-QA1 › Q20-Q28 › Q codes › Q21

Q21

Congenital malformations of cardiac septa

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 7 more specific codes instead:

  • Q21.0 Ventricular septal defect
  • Q21.1 Atrial septal defect (also a header)
  • Q21.2 Atrioventricular septal defect (also a header)
  • 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

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2012 Added to the draft code set draft Congenital malformations of cardiac septa

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.

This code

Excludes1 - never coded here

  • acquired cardiac septal defect (I51.0)