Mitral stenosis

This code represents a narrowing of the mitral valve opening, which restricts blood flow from the left atrium to the left ventricle of the heart. This obstruction can lead to increased pressure in the left atrium and pulmonary circulation, potentially causing symptoms like shortness of breath and fatigue.

Use this code when documentation clearly indicates a diagnosis of mitral stenosis, often identified through echocardiography or cardiac catheterization. This applies to both rheumatic and non-rheumatic etiologies of the valve narrowing.

• Specify the underlying cause of the mitral stenosis if known (e.g., rheumatic fever) using an additional code.
• Distinguish from mitral insufficiency (regurgitation), which involves a leaky valve rather than a narrowed one.
• Consider any associated complications, such as atrial fibrillation or pulmonary hypertension, and code them separately.