Thoracic aneurysm, ruptured

This code signifies a life-threatening condition where the wall of the aorta within the chest cavity has torn, leading to internal bleeding. It represents an acute medical emergency requiring immediate intervention. The rupture can occur in any segment of the thoracic aorta, including the ascending, arch, or descending portions.

Apply this code for patients presenting with a confirmed diagnosis of a ruptured thoracic aortic aneurysm. Documentation should clearly state "ruptured" in conjunction with the thoracic aneurysm. This code is appropriate for cases identified through imaging studies (e.g., CT angiography) and/or surgical findings.

• Always ensure documentation explicitly states "ruptured" to differentiate from an unruptured thoracic aneurysm.
• Sequence this code as the principal diagnosis when it is the primary reason for the admission and treatment.
• Do not confuse with dissection without rupture; these are distinct clinical entities.