Aortic aneurysm of unspecified site, ruptured

This code signifies a life-threatening condition where a weakened area in the aorta, the body's largest artery, has burst open. This rupture leads to severe internal bleeding and is a medical emergency requiring immediate intervention. The specific location of the aneurysm along the aorta (e.g., thoracic, abdominal) is not documented or is unknown.

Use this code when documentation clearly indicates a ruptured aortic aneurysm without specifying the anatomical site. This is appropriate in emergent situations where the rupture is confirmed, but further diagnostic imaging to pinpoint the exact location is pending or not yet available. Supporting documentation would include operative reports, emergency department notes, or pathology reports confirming a ruptured aneurysm.

• Do not use this code if the rupture site (e.g., thoracic, abdominal) is documented; instead, select a more specific code from the 441 series.
• Always sequence this code as the principal diagnosis when it is the reason for admission and treatment.
• Ensure documentation explicitly states "ruptured" to differentiate from an unruptured aneurysm.