All ICD10 Codes

Q21.2

Non-Billable
ChapterQ00–Q99
Ranksubcategory
Official Description

Atrioventricular septal defect

Use a more specific code (4 billable)
Q21.20Atrioventricular septal defect, unspecified as to partial or completeQ21.21Partial atrioventricular septal defectQ21.22Transitional atrioventricular septal defectQ21.23Complete atrioventricular septal defect
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

Instructional Notes

Includes
  • Atrioventricular canal defect
  • Endocardial cushion defect
  • Ostium primum atrial septal defect (type I)
General instructions are available for the parent sections:
View CH17 NotesView Q21 Notes

Clinical Hierarchy

BillableHas subcodes
CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
Q20-Q28Congenital malformations of the circulatory system (Q20-Q28)
Q21Congenital malformations of cardiac septa
Q21.2Atrioventricular septal defectNot billable
Q21.20Atrioventricular septal defect, unspecified as to partial or completeBillable
Q21.21Partial atrioventricular septal defectBillable
Q21.22Transitional atrioventricular septal defectBillable
Q21.23Complete atrioventricular septal defectBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q21.2:

categoryQ21
Congenital malformations of cardiac septa
View context instructions
chapterCH17
Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
View context instructions

Code History

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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