ICD-10-CM>Q00-QA1>Q20-Q28>Q23>Q23.8Q23.8Other congenital malformations of aortic and mitral valvesNon-Billable/Non-SpecificCodesQ23.81Bicuspid aortic valveQ23.82Congenital mitral valve cleft leafletQ23.88Other congenital malformations of aortic and mitral valves