Q23.4
Hypoplastic left heart syndrome
Risk-adjusting (HCC)Billable code
HCC risk adjustment mapping
RxHCC V08
RXHCC191
Ventricular Septal Defect and Major Congenital Heart Disorders
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities
Excludes 2
inborn errors of metabolism (E70-E88)
Note
Codes from this chapter are not for use on maternal records
Official Guidelines for Q23.4
FY 2026 ›Sections that reference Q23.4
Sections whose FY 2026 text names Q23.4, its Q23 category, or a range containing it — the chapter guidance above is the authoritative source.
Find Q23.4 in the alphabetic index
8 index paths lead to this code
- Hypoplasia, hypoplastic › left heart syndrome
- Syndrome › hypoplastic left-heart
- Atresia, atretic › aortic › congenital with hypoplasia of ascending aorta and defective development of left ventricle
- Atresia, atretic › aortic › in hypoplastic left heart syndrome
- Atresia, atretic › mitral valve › in hypoplastic left heart syndrome
- Hypoplasia, hypoplastic › aorta, aortic › ascending, in hypoplastic left heart syndrome
- Development › defective, congenital › left ventricle › in hypoplastic left heart syndrome
- Hypoplasia, hypoplastic › aorta, aortic › valve › in hypoplastic left heart syndrome