In simple words: A birth defect affecting both the aortic and mitral valves of the heart, where the specific type of malformation is not specified.

Congenital malformation of aortic and mitral valves, unspecified.

Example 1: A newborn infant is diagnosed with a heart murmur. Upon echocardiogram, it is revealed that both the aortic and mitral valves have structural abnormalities, but the precise nature of the defects is not yet determined. The diagnosis is coded as Q23.9., A pediatric cardiologist examines a 6-month-old baby who has been experiencing shortness of breath and difficulty feeding. An echocardiogram shows congenital malformations affecting both the aortic and mitral valves. Further investigation is needed to identify the specific defects and determine the appropriate treatment. Q23.9 is used as the initial diagnosis code., A fetus undergoes a fetal echocardiogram, which reveals combined abnormalities of the aortic and mitral valves. The specific type of malformation cannot be ascertained prenatally. The code Q23.9 is used for prenatal diagnosis.

Detailed clinical documentation of the congenital malformations observed in the aortic and mitral valves, including imaging results (e.g., echocardiogram) and any associated symptoms.If specific defects are identified later, a more precise code should be used.

** This code is a general code for combined congenital malformations of the aortic and mitral valves when the specific defects are not yet specified. It is important to update the code to a more specific one once the precise defects are identified.