ICD-10-CM › Q00-QA1 › Q20-Q28 › Q21 Congenital malformations of cardiac septa › Q21.0

Q21.0

Ventricular septal defect

ValidICD-10-CM diagnosis code.

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

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 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. FY2007 Added to the draft code set draft Ventricular 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.

Showing 40 of 128 index phrases.

Codes in the same group

CodeDescriptionStatus
Q21.1 Atrial septal defect Not billable
Q21.2 Atrioventricular septal defect Not billable
Q21.3 Tetralogy of Fallot Valid
Q21.4 Aortopulmonary septal defect Valid
Q21.8 Other congenital malformations of cardiac septa Valid
Q21.9 Congenital malformation of cardiac septum, unspecified Valid