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Q21.1 - Atrial septal defect


The ICD 10 Code for Atrial septal defect is listed as Q21.1.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field Value
Diagnosis Code: Q21.1
Description: Atrial septal defect
  • Coronary sinus defect
  • Patent or persistent foramen ovale
  • Patent or persistent ostium secundum defect (type II)
  • Patent or persistent sinus venosus defect
Diagnostic Related Groups
(MS-DRG v30.0)
306 - Cardiac Congenital & Valvular Disorders W Mcc
307 - Cardiac Congenital & Valvular Disorders W/o Mcc
Chapter Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Block Congenital malformations of the circulatory system (Q20-Q28)
Parent Q21 - Congenital malformations of cardiac septa
ICD-9-CM Diagnosis Codes General Equivalence Mappings (GEMS):
ICD 9 Dx Code: 745.5 - Ostium secundum type atrial septal defect
ICD-10-CM Siblings (same level / similar specificity) of Q21.1:
Q21.0 - Ventricular septal defect
Q21.2 - 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