ICD-10-CM > I00-I99 > I30-I5A > I34 > I34.8 > I34.81 I34.81 Nonrheumatic mitral (valve) annulus calcification Billable/Specific Copy Code Copy Description Applicable To Nonrheumatic mitral (valve) annular calcificationMitral (valve) annulus calcification NOS Code Also , if applicable:nonrheumatic mitral (valve) insufficiency (I34.0)nonrheumatic mitral (valve) stenosis (I34.2)