Specific code icon 2017 ICD-10-CM Diagnosis Code Q21.2

Atrioventricular septal defect

    2016 2017 Billable/Specific Code POA Exempt

  • Q21.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • This is the American ICD-10-CM version of Q21.2. Other international versions of ICD-10 Q21.2 may differ.
  • Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Clinical Information
  • 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.
Applicable To
  • Common atrioventricular canal
  • Endocardial cushion defect
  • Ostium primum atrial septal defect (type I)
Approximate Synonyms
  • 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 v34.0):
  • 306 Cardiac congenital and valvular disorders with mcc
  • 307 Cardiac congenital and valvular disorders without mcc

Convert ICD-10-CM Q21.2 to ICD-9-CM

The following ICD-10-CM Index entries contain back-references to ICD-10-CM Q21.2:
  • Canal - see also condition
  • atrioventricular common Q21.2
  • Common
  • atrioventricular canal Q21.2
  • Defect, defective Q89.9
  • cushion, endocardial Q21.2
    atrial septal (ostium secundum type) Q21.1
    ostium primum type Q21.2
    canal Q21.2
    septum Q21.2
    primum Q21.2
  • Endocardium, endocardial - see also condition
  • cushion defect Q21.2
  • Imperfect
  • closure (congenital)
    atrioventricular ostium Q21.2
  • Ostium
  • atrioventriculare commune Q21.2
    primum (arteriosum) (defect) (persistent) Q21.2
  • Persistence, persistent (congenital)
  • atrioventricular canal Q21.2
    atrioventriculare commune Q21.2
    primum Q21.2
  • Single
  • atrium Q21.2