Thoracoabdominal aneurysm, ruptured

This code signifies a life-threatening condition involving a ruptured aneurysm that spans both the thoracic and abdominal aorta. It indicates a tear in the aortic wall, leading to significant internal bleeding and hemodynamic instability.

Assign this code when documentation clearly states a ruptured thoracoabdominal aortic aneurysm. This typically presents as acute, severe pain, hypotension, and signs of hypovolemic shock. Supporting documentation includes imaging reports (CT, MRI) confirming the rupture and the aneurysm's thoracoabdominal location.

• Ensure the documentation explicitly states "ruptured" for this code to be appropriate.
• Distinguish carefully from unruptured thoracoabdominal aneurysms or ruptures confined to either the thoracic or abdominal aorta.
• Always sequence this code as the principal diagnosis when it is the reason for admission and treatment.