VITiếng Việt
ICD-10 Vietnam

Q21.0Ventricular septal defect

Code usage status

Primary diagnosis

May be used as the primary diagnosis

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

Specificity

Complete code in the classification

Use when the diagnosis matches and no exclusion applies.

Chapter XVII
Congenital malformations, deformations and chromosomal abnormalities
Group Q20-Q28
Congenital malformations of the circulatory system
Official Vietnamese name
Dị tật thông liên thất

Related Q21 codes

Q21 Congenital malformations of cardiac septa 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

View coding guide →
  • 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.