Q21.4 is the ICD-10 code for Aortopulmonary septal defect. It is a four-character subcategory of Q21 (Congenital malformations of cardiac septa), the most specific level in the WHO edition. It belongs to the block Q20–Q28 (Congenital malformations of the circulatory system) in Chapter XVII, Congenital malformations, deformations and chromosomal abnormalities.
- Code type
- Subcategory (4 characters)
- Chapter
- XVII · Q00–Q99
- Classification
- WHO ICD-10, 2019 version
What Q21.4 includes
Conditions and terms that are coded here.
- Aortic septal defect
- Aortopulmonary window
Q21.4 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
Q21.4Aortopulmonal septumdefekt
DQ214Aortopulomnal septumdefekt
Q21.4Aortan ja keuhkovaltimorungon väliseinän puutos
Q21.4Aortopulmonaler Septumdefekt
Q21.4Communication aortopulmonaire
Q21.4aortopulmonaal-septumdefect
Q21.4Aortopulmonary septal defect
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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