ICD-10-CM category
Q23: Congenital malformations of aortic and mitral valves
Codes under Q23 (Congenital malformations of aortic and mitral valves). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q23.0 | Congenital stenosis of aortic valve | ✓ |
| Q23.1 | Congenital insufficiency of aortic valve | ✓ |
| Q23.2 | Congenital mitral stenosis | ✓ |
| Q23.3 | Congenital mitral insufficiency | ✓ |
| Q23.4 | Hypoplastic left heart syndrome | ✓ |
| Q23.8 | Other congenital malformations of aortic and mitral valves | — |
| Q23.9 | Congenital malformation of aortic and mitral valves, unspecified | ✓ |
| Q23.81 | Bicuspid aortic valve | ✓ |
| Q23.82 | Congenital mitral valve cleft leaflet | ✓ |
| Q23.88 | Other congenital malformations of aortic and mitral valves | ✓ |
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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