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Q21.2

Non-billable

Atrioventricular septal defect

Q21.2 is the ICD-10-CM code for Atrioventricular septal defect. It is a non-billable category code — use a more specific child code such as Q21.20 for billing.

Status
Header (non-billable)
Chapter
Q00-Q99
Parent
Q21
Subcodes
4
Edition
FY2026

Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities

Includes

  • •Atrioventricular canal defect
  • •Endocardial cushion defect
  • •Ostium primum atrial septal defect (type I)

Frequently asked questions

What is ICD-10 code Q21.2?
Q21.2 is the ICD-10-CM code for "Atrioventricular septal defect". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
Is Q21.2 a billable code?
No — Q21.2 is a non-billable header code. Use a more specific child code (such as Q21.20) for billing.
What are the subcodes of Q21.2?
Q21.2 has 4 more specific child codes, including Q21.20, Q21.21, Q21.22.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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