Supraceliac aneurysm of the thoracoabdominal aorta, w/o rupt

This code describes a localized, permanent dilation of the thoracoabdominal aorta that originates above the celiac artery, without evidence of rupture. This type of aneurysm involves the segment of the aorta spanning both the thoracic and abdominal cavities.

Use this code for patients diagnosed with an unruptured aneurysm affecting the thoracoabdominal aorta, specifically located superior to the celiac axis. Documentation should clearly specify the location as supraceliac and confirm the absence of rupture, often supported by imaging reports (e.g., CT angiography, MRI).

• Differentiate from infradiaphragmatic or pararenal thoracoabdominal aneurysms; the "supraceliac" descriptor is key.
• Ensure documentation explicitly states "without rupture" to avoid miscoding with ruptured aneurysm codes.
• Consider additional codes for associated conditions, such as atherosclerosis (I70.0) if documented as the cause.