Nonrheumatic aortic (valve) stenosis

This code describes a narrowing of the aortic valve opening that is not caused by rheumatic fever. This stenosis restricts blood flow from the left ventricle to the aorta, leading to increased pressure and potential heart failure. It typically develops over time due to calcification and degeneration of the valve leaflets.

Use this code for patients diagnosed with aortic valve stenosis where rheumatic etiology has been explicitly ruled out or is not documented. Documentation supporting this code includes echocardiogram reports detailing valve calcification and reduced valve area, as well as physician notes confirming the nonrheumatic nature of the stenosis.

• Differentiate from rheumatic aortic stenosis (I06.1) based on physician documentation.
• Do not use for congenital aortic stenosis (Q23.0); this code is for acquired, non-rheumatic forms.
• Code any associated heart failure or other complications separately.