ICD-10 Code I71.11 – Aneurysm of the ascending aorta, ruptured (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I71.11 – Aneurysm of the ascending aorta, ruptured
What it is
This code identifies a ruptured aneurysm in the ascending aorta, the first part of the aorta leaving the heart. It indicates a life-threatening tear or leak in an already enlarged vessel.
Clinical signs
Clinical features vary; refer to documentation. Typical records may note sudden chest or back pain, shock, or signs of acute blood loss, along with imaging or operative confirmation of rupture.
When to use this code
Use I71.11 when the provider documents a ruptured aneurysm of the ascending aorta. Code it from imaging, surgical, or discharge documentation that clearly identifies the ascending segment and rupture.
Do not assume the site from a generic thoracic aortic aneurysm note. If the record only says “aortic aneurysm” or does not specify rupture, check documentation before assigning this code.
Do not use for
Do not use this code for an unruptured ascending aortic aneurysm or aneurysms in other aortic segments. Check documentation if the site, rupture status, or acuity is unclear.
Coding tip
Match both elements exactly: ascending aorta and ruptured; if either is missing, verify the record before coding.