396.3
ICD-9-CMThis code signifies the simultaneous presence of two distinct valvular heart diseases: mitral regurgitation and aortic regurgitation. Mitral insufficiency involves the incomplete closure of the mitral valve, leading to blood flowing backward into the left atrium during systole. Aortic insufficiency describes the incomplete closure of the aortic valve, causing blood to leak back into the left ventricle during diastole.
Use this code when documentation clearly indicates both mitral valve insufficiency and aortic valve insufficiency are present in a patient. This typically occurs in scenarios such as echocardiogram reports confirming regurgitation in both valves, or physician notes explicitly stating "mitral and aortic insufficiency."
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