Home > 2015 ICD-10-CM Diagnosis Codes > Congenital malformations, deformations and chromosomal abnormalities Q00-Q99 > Congenital malformations of the circulatory system Q20-Q28 > Congenital malformations of cardiac septa Q21-
2015 ICD-10-CM Diagnosis Code Q21.2
Atrioventricular septal defect
2015Billable CodePOA Exempt
Q21.2 is a billable ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
On October 1, 2015 ICD-10-CM will replace ICD-9-CM in the United States, therefore, Q21.2 - and all other ICD-10-CM codes - should only be used for training or planning purposes until then.
This is the American ICD-10-CM version of Q21.2. Other international ICD-10 versions may differ.
A spectrum of septal defects involving the atrial septum; ventricular septum; and the atrioventricular valves (tricuspid valve; bicuspid valve). These defects are due to incomplete growth and fusion of the endocardial cushions which are important in the formation of two atrioventricular canals, site of future atrioventricular valves.
Common atrioventricular canal
Endocardial cushion defect
Ostium primum atrial septal defect (type I)
Atrial septal defect, ostium primum type
Atrial septal defect, primum
Ostium primum defect
Present On Admission
Q21.2 is considered exempt from POA reporting.
ICD-10-CM Q21.2 is grouped within Diagnostic Related Group(s) (MS-DRG v30.0):
306 Cardiac congenital & valvular disorders with mcc
307 Cardiac congenital & valvular disorders without mcc