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Q21.4

Billable

Aortopulmonary septal defect

Q21.4 is the ICD-10-CM code for Aortopulmonary septal defect. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
Q00-Q99
Parent
Q21
Edition
FY2026

Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities

What this means — in plain language

MedlinePlus · NIH

What are congenital heart defects? Congenital heart defects (CHDs) are problems with the structure of the heart. "Congenital" means that that the problems are present at birth. These defects happen when a fetus's heart doesn't develop normally during pregnancy. Congenital heart defects are the most common type of birth defect . Congenital heart defects can change the way the heart pumps blood. They may make blood…

Read more about Congenital Heart Defects at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Includes

  • •Aortic septal defect
  • •Aortopulmonary window

Frequently asked questions

What is ICD-10 code Q21.4?
Q21.4 is the ICD-10-CM code for "Aortopulmonary septal defect". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
Is Q21.4 a billable code?
Yes — Q21.4 is a billable, specific ICD-10-CM code valid for reimbursement.

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

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