Nonrheumatic aortic (valve) stenosis with insufficiency

This code signifies a condition where the aortic valve is both narrowed (stenosis) and fails to close properly (insufficiency or regurgitation), but the cause is not rheumatic fever. This combined dysfunction impairs blood flow from the left ventricle to the aorta and allows blood to leak back into the ventricle, leading to increased cardiac workload.

Apply this code when documentation clearly indicates both aortic stenosis and insufficiency of non-rheumatic origin. This typically includes findings from echocardiograms, cardiac catheterization reports, and physician notes describing congenital anomalies, degenerative changes, or other non-rheumatic etiologies.

• Ensure the documentation explicitly states "nonrheumatic" or provides an etiology that rules out rheumatic fever.
• Do not use this code if only stenosis or only insufficiency is present; a combined defect is required.
• Consider sequencing this code with codes for associated heart failure (e.g., I50.x) if documented.