Paravisceral aneurysm of the thoracoabdominal aorta, ruptd

This code signifies a life-threatening condition involving a ruptured aneurysm located in the thoracoabdominal aorta, specifically affecting the paravisceral segment. A paravisceral aneurysm is situated near the origins of the visceral arteries, and its rupture leads to acute hemorrhage and severe hemodynamic instability.

Apply this code when documentation clearly indicates a ruptured aneurysm of the thoracoabdominal aorta, with specific mention or implication of the paravisceral segment. This diagnosis is typically made in emergency settings based on imaging studies (e.g., CT angiography) and clinical presentation of acute pain, shock, and internal bleeding.

• Ensure documentation specifies "ruptured" to differentiate from an unruptured aneurysm.
• Verify the anatomical location as "thoracoabdominal" and "paravisceral" to avoid miscoding to other aortic segments.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, especially in acute care settings.