ICD-10 Code I71.9 – Aortic aneurysm of unspecified site, without rupture (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I71.9 – Aortic aneurysm of unspecified site, without rupture
What it is
This code identifies an aortic aneurysm when the site is not specified and there is no rupture. Use it for documented aneurysm of the aorta when the record does not name the segment.
Clinical signs
Clinical features vary; refer to documentation. Many cases are found on imaging, while others may present with chest, back, or abdominal pain, or be asymptomatic.
When to use this code
Use I71.9 when the provider documents an aortic aneurysm without rupture but does not identify the exact aortic location. It also fits when the note confirms aneurysm of the aorta and no more specific code is supported. Check documentation if the site is later clarified.
Do not use for
Do not use this code for ruptured aortic aneurysm or for aneurysms with a clearly documented site that has a more specific ICD-10 code. Check documentation if dissection is mentioned.
Coding tip
If the report names the ascending, descending, thoracic, abdominal, or other aortic segment, code the more specific diagnosis instead of I71.9.