Thoracoabdominal aortic aneurysm, without rupture, unsp

This code signifies a localized dilation or bulging of the aorta that affects both the thoracic (chest) and abdominal segments, without evidence of a tear or breach in the vessel wall. It represents an unruptured aneurysm spanning the diaphragm, impacting a significant portion of the body's main artery.

Apply this code when documentation clearly indicates an unruptured aneurysm involving both the thoracic and abdominal aorta, and no further specificity regarding the exact location within these segments is provided. This is appropriate for initial diagnoses or follow-up of a known thoracoabdominal aneurysm where rupture has been ruled out.

• Ensure the documentation explicitly states "thoracoabdominal" and "without rupture."
• Avoid using this code if the aneurysm is specified as solely thoracic or solely abdominal; use the more specific codes in those instances.
• If rupture is present, a different code from the I71.1- or I71.3- series would be appropriate.