ICD-10 Code I71.2 – Thoracic aortic aneurysm, without rupture (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I71.2 – Thoracic aortic aneurysm, without rupture
What it is
This code identifies a thoracic aortic aneurysm, meaning an abnormal widening of the aorta in the chest, without evidence of rupture. Use it when the record documents the aneurysm but no tear or leak.
Clinical signs
Clinical features vary; refer to documentation. Many patients are asymptomatic, while others may have chest or back discomfort, a pulsatile mass on imaging, or incidental findings on CT, MRI, or echocardiography.
When to use this code
Use I71.2 when the provider documents a thoracic aortic aneurysm and clearly states there is no rupture. It also fits when imaging confirms a thoracic aneurysm and the note supports an unruptured diagnosis. If the chart mentions dissection, rupture, or another aortic disorder, check documentation before coding.
Do not use for
Do not use this code for a ruptured thoracic aneurysm or for aortic dissection. If the aneurysm is in the abdominal aorta or another vessel, select the more specific documented code.
Coding tip
Verify the anatomic site and whether rupture is excluded before assigning I71.2.