Diagnosis Code

Q21.1 ATRIAL SEPTAL DEFECT


Code Information

Diagnosis Code: Q21.1

Short Description: Atrial septal defect

Long Description: Atrial septal defect

The code Q21.1 is NOT VALID for claim submission

Code Classification:

  • Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • Congenital malformations of the circulatory system (Q20-Q28)
      • Congenital malformations of cardiac septa (Q21)
        • Q21.1 Atrial septal defect

Code Version: 2022 ICD-10-CM


References to Index of Diseases and Injuries

The code Q21.1 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Type 2 Excludes Notes:
    • ostium primum atrial septal defect (type I) (@Q21.20*)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
Q21.1 Right Arrow 745.5 Secundum atrial sept def

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
Q21 Congenital malformations of cardiac septa
Q21.0 Ventricular septal defect
Q21.10 Atrial septal defect, unspecified
Q21.11 Secundum atrial septal defect
Q21.12 Patent foramen ovale
Q21.13 Coronary sinus atrial septal defect
Q21.14 Superior sinus venosus atrial septal defect
Q21.15 Inferior sinus venosus atrial septal defect
Q21.16 Sinus venosus atrial septal defect, unspecified
Q21.19 Other specified atrial septal defect
Q21.2 Atrioventricular septal defect
Q21.20 Atrioventricular septal defect, unspecified as to partial or complete
Q21.21 Partial atrioventricular septal defect
Q21.22 Transitional atrioventricular septal defect
Q21.23 Complete atrioventricular septal defect
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


This page was last updated on: 10/1/2023