ICD-10 Code I71.6 – Thoracoabdominal aortic aneurysm, without rupture (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I71.6 – Thoracoabdominal aortic aneurysm, without rupture
What it is
This code identifies a thoracoabdominal aortic aneurysm that has not ruptured. It means the aorta is abnormally widened across the chest and abdominal portions, but there is no documented rupture.
Clinical signs
Clinical features vary; refer to documentation. Patients may be asymptomatic, or imaging may show a large dilated aorta involving both thoracic and abdominal segments.
When to use this code
Use I71.6 when the provider documents a thoracoabdominal aortic aneurysm and clearly states there is no rupture. Apply it for confirmed diagnoses from imaging, specialist notes, or discharge summaries. If the record mentions rupture, dissection, or another aortic segment only, check documentation before assigning this code.
Do not use for
Do not use this code for ruptured thoracoabdominal aneurysm or for isolated thoracic or abdominal aortic aneurysms. If the documentation is unclear about location or rupture status, check documentation.
Coding tip
Code the aneurysm only when the provider documents both the thoracoabdominal location and the absence of rupture.