Home / ICD-10-CM / Chapter 17 / Q23

Q23 Congenital malformations of aortic and mitral valves

ICD-10-CM category Q23 sits in Chapter 17 (Congenital malformations, deformations and chromosomal abnormalities, Q00-Q99). It contains 9 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

Q23.8 Other congenital malformations of aortic and mitral valves

Billable codes in Q23

CodeDescription
Q23.0Congenital stenosis of aortic valve
Q23.1Congenital insufficiency of aortic valve
Q23.2Congenital mitral stenosis
Q23.3Congenital mitral insufficiency
Q23.4Hypoplastic left heart syndrome
Q23.81Bicuspid aortic valve
Q23.82Congenital mitral valve cleft leaflet
Q23.88Other congenital malformations of aortic and mitral valves
Q23.9Congenital malformation of aortic and mitral valves, unspecified

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