Aortic aneurysm of unspecified site, without rupture

This code signifies a localized dilation or ballooning of the aorta, the body's largest artery, where the specific anatomical location of the aneurysm is not documented. It indicates that the aortic wall has weakened and expanded, but there is no evidence of a tear or rupture.

Use this code when documentation confirms an aortic aneurysm but does not specify if it's thoracic, abdominal, or thoracoabdominal. This code is appropriate when the physician's notes clearly state "aortic aneurysm, unspecified site" or similar language, and explicitly rule out rupture.

• Always seek clarification from the provider if the site of the aortic aneurysm is not specified, as more specific codes exist.
• Do not use this code if rupture is documented; instead, select a code from the I71.X1 series.
• Distinguish from aortic dissection (I71.0-), which involves a tear in the inner layer of the aorta, rather than just a dilation.