Aneurysm of the ascending aorta, without rupture

This code signifies a localized dilation or ballooning of the ascending portion of the aorta, the large artery originating from the left ventricle of the heart, which has not ruptured. This condition involves a weakening of the aortic wall, leading to an abnormal outward bulging.

Apply this code when documentation explicitly states an aneurysm of the ascending aorta without any indication of rupture. This diagnosis is typically made through imaging studies such as CT scans, MRIs, or echocardiograms. Use this code for surveillance, management, or surgical planning of an intact ascending aortic aneurysm.

• Ensure documentation clearly specifies "ascending aorta" and "without rupture" to differentiate from other aortic segments or ruptured aneurysms.
• Do not confuse with dissecting aneurysms (I71.0- series) or aneurysms of other aortic segments (e.g., I71.22 for aortic arch).
• Code any associated Marfan syndrome (Q87.4-) or other genetic conditions as additional diagnoses.