Q23.4
Billable codeHypoplastic left heart syndrome
The ICD-10 code for hypoplastic left heart syndrome is Q23.4.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Q23.0Congenital stenosis of aortic valve
- Q23.1Congenital insufficiency of aortic valve
- Q23.2Congenital mitral stenosis
- Q23.3Congenital mitral insufficiency
- Q23.8Other congenital malformations of aortic and mitral valvesnon-billable header
- Q23.9Congenital malformation of aortic and mitral valves, unspecified
- Q23.4Hypoplastic left heart syndrome
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 7467
Associated MS-DRGs
Q23.4 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.