Paravisceral aneurysm of thoracoabdominal aorta, w/o rupt

This code describes an unruptured aneurysm located in the thoracoabdominal aorta, specifically affecting the segment adjacent to the visceral organs. It signifies a localized, permanent dilation of this arterial wall, without evidence of a tear or hemorrhage.

Use this code for patients diagnosed with an unruptured aneurysm of the thoracoabdominal aorta that is situated near the abdominal organs. Documentation should clearly specify the thoracoabdominal location and confirm the absence of rupture, often supported by imaging studies such as CT angiography or MRI.

• Ensure documentation explicitly states "without rupture" to avoid miscoding with ruptured aneurysms.
• Distinguish from aneurysms solely of the thoracic aorta (I71.2-) or abdominal aorta (I71.4-), as this code specifies the combined thoracoabdominal segment.
• Always review imaging reports and physician notes for precise anatomical location and rupture status.