Dissection of abdominal aorta

This code signifies a tear in the inner lining of the abdominal aorta, allowing blood to flow between the layers of the aortic wall, creating a false lumen. This condition can lead to compromised blood flow to vital organs and is a medical emergency.

Apply this code when documentation clearly indicates an aortic dissection specifically located within the abdominal segment of the aorta. Supporting documentation typically includes imaging reports (e.g., CT angiography, MRI) confirming the dissection's presence and anatomical location.

• Differentiate from dissection of other aortic segments (e.g., thoracic, thoracoabdominal) as specific codes exist for each.
• Ensure the documentation specifies "dissection" and not merely an aneurysm or rupture, as these have distinct codes.
• Code any associated complications, such as organ ischemia or rupture, in addition to the dissection.