Congenital insufficiency of aortic valve

This code signifies a structural defect of the aortic valve present at birth, resulting in its inability to close completely. This incomplete closure leads to regurgitation of blood back into the left ventricle during diastole, causing volume overload and potential cardiac dysfunction.

Apply this code when documentation explicitly states a congenital origin for aortic valve insufficiency or regurgitation. This typically includes findings from echocardiograms, cardiac catheterization reports, or physician notes detailing a malformed aortic valve from birth. Do not use for acquired forms of aortic insufficiency.

• Differentiate from acquired aortic insufficiency (e.g., I35.1), which has different etiologies and coding.
• Ensure documentation specifies "congenital" or "present at birth" to support this code.
• Code any associated congenital heart defects separately, if present and documented.