ICD-10 Code I71.5 – Thoracoabdominal aortic aneurysm, ruptured (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I71.5 – Thoracoabdominal aortic aneurysm, ruptured
What it is
I71.5 identifies a thoracoabdominal aortic aneurysm that has ruptured. It means the enlarged aorta involves both the chest and abdominal portions and has already torn or leaked.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include sudden severe chest, back, abdominal, or flank pain, hypotension, shock, or evidence of internal bleeding on imaging or operative report.
When to use this code
Use I71.5 when the record clearly states a ruptured thoracoabdominal aortic aneurysm. Code it from emergency, inpatient, operative, or death documentation if rupture is confirmed and the aneurysm spans the thoracic and abdominal aorta.
Do not infer rupture from pain alone. If the provider documents dissection, nonruptured aneurysm, or another aortic disorder instead, choose the specific documented diagnosis. Check documentation for the exact vessel segment and complication.
Do not use for
Do not use this code for an unruptured thoracoabdominal aneurysm or for isolated thoracic or abdominal aortic aneurysms. Check documentation if the chart describes dissection without rupture.
Coding tip
Confirm both anatomic extent and rupture status in the provider’s final diagnosis before assigning I71.5.