Home > 2014 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-
2014 ICD-10-CM Diagnosis Code Q21.2
Atrioventricular septal defect
Q21.2 is a billable ICD-10-CM code that can be used to specify a diagnosis.
On October 1, 2014 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.
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.
Between 1999-2007 there were 502 deaths in the United States where ICD-10 Q21.2 was indicated as the underlying cause of death [source: cdc.gov]
ICD-10 Q21.2 as underlying cause of death data broken down by: gender, age, race, year
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