Congenital mitral valve cleft leaflet

This code identifies a congenital heart defect characterized by an abnormal division or split in one of the mitral valve leaflets. This structural anomaly can lead to mitral valve regurgitation or stenosis, affecting blood flow between the left atrium and left ventricle. It is a malformation present at birth.

Use this code for patients diagnosed with a congenital cleft in a mitral valve leaflet, confirmed by echocardiography or other cardiac imaging. This diagnosis is often made in infancy or childhood, but can be identified in adulthood. Documentation should clearly specify "cleft mitral valve leaflet" or "mitral valve cleft."

• Differentiate from acquired mitral valve prolapse or other forms of mitral insufficiency; this code is strictly for congenital clefts.
• Code any associated congenital heart defects separately, such as ventricular septal defects, if documented.
• Ensure documentation specifies "congenital" to support the use of this Q-code.