ICD-10 Code I71.50 – Thoracoabdominal aortic aneurysm, ruptured, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I71.50 – Thoracoabdominal aortic aneurysm, ruptured, unspecified
What it is
This code identifies a ruptured aneurysm involving the thoracic and abdominal portions of the aorta when the exact segment is not specified. Use it for documentation of a thoracoabdominal aortic aneurysm with rupture.
Clinical signs
Clinical features vary; refer to documentation. Rupture may be associated with sudden severe chest, back, abdominal, or flank pain, hypotension, and signs of acute blood loss or shock.
When to use this code
Use this code when the record clearly documents a ruptured thoracoabdominal aortic aneurysm and does not identify a more specific segment. It is appropriate for emergency, inpatient, or operative documentation showing rupture. If the provider specifies another aortic segment or notes no rupture, choose a different code.
Do not use for
Do not use it for an unruptured thoracoabdominal aortic aneurysm or for aneurysms limited to another aortic location. Check documentation if the rupture status or exact site is unclear.
Coding tip
Code the rupture only when the physician documents it explicitly; do not infer rupture from symptoms alone.