VITiếng Việt
ICD-10 Vietnam

Q21Congenital malformations of cardiac septa

Code usage status

Primary diagnosis

Select a more specific code

Apply only when it matches the confirmed diagnosis and the documented clinical record.

Specificity

Do not use Q21 directly

Use the most specific code supported by the record.

Chapter XVII
Congenital malformations, deformations and chromosomal abnormalities
Group Q20-Q28
Congenital malformations of the circulatory system
Official Vietnamese name
Dị tật bẩm sinh của vách tim
Additional WHO coding guidance
Excl.: acquired cardiac septal defect (I51.0)

Related Q21 codes

Q21.0 Primary diagnosis candidate Ventricular septal defect Q21.1 Primary diagnosis candidate Atrial septal defect Q21.2 Primary diagnosis candidate Atrioventricular septal defect Q21.3 Primary diagnosis candidate Tetralogy of Fallot Q21.4 Primary diagnosis candidate Aortopulmonary septal defect Q21.8 Primary diagnosis candidate Other congenital malformations of cardiac septa Q21.9 Primary diagnosis candidate Congenital malformation of cardiac septum, unspecified

Clinical record checklist

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  • Confirm that the code matches the final documented diagnosis.
  • Use one primary-diagnosis code and record only relevant additional conditions.
  • Review Ministry indicators, inclusions, exclusions and notes.
  • Do not infer a diagnosis beyond the clinical record.

2026 regulatory basis

Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.