ICD-10 Code I71.22 – Aneurysm of the aortic arch, without rupture (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I71.22 – Aneurysm of the aortic arch, without rupture
What it is
I71.22 identifies a nonruptured aneurysm involving the aortic arch. Use it when the arch is abnormally widened but there is no documented tear or rupture.
Clinical signs
Clinical features vary; refer to documentation. Imaging may show focal dilation of the aortic arch, often found incidentally or during evaluation for chest, back, or compressive symptoms.
When to use this code
Use this code when the provider documents an aneurysm of the aortic arch and specifically states it is without rupture. It is appropriate for confirmed imaging findings, specialist assessments, or discharge diagnoses that name the arch as the involved segment. Check documentation if the report only says thoracic aortic aneurysm without location.
Do not use for
Do not use this code for ruptured aortic aneurysm or for aneurysms in other aortic segments. If the arch location or rupture status is unclear, check documentation.
Coding tip
Code the exact aortic segment and rupture status as documented; unspecified thoracic aneurysm may require a different code.