VITiếng Việt
ICD-10 Vietnam

Q23.4Hypoplastic left heart syndrome

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
Hội chứng tim trái thiểu sản
Additional WHO coding guidance
Atresia, or marked hypoplasia of aortic orifice or valve, with hypoplasia of ascending aorta and defective development of left ventricle (with mitral valve stenosis

Related Q23 codes

Q23 Congenital malformations of aortic and mitral valves Q23.0 Primary diagnosis candidate Congenital stenosis of aortic valve Q23.1 Primary diagnosis candidate Congenital insufficiency of aortic valve Q23.2 Primary diagnosis candidate Congenital mitral stenosis Q23.3 Primary diagnosis candidate Congenital mitral insufficiency Q23.8 Primary diagnosis candidate Other congenital malformations of aortic and mitral valves Q23.9 Primary diagnosis candidate Congenital malformation of aortic and mitral valves, 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.