ICD-10 Code I74.1 – Embolism and thrombosis of other and unspecified parts of aorta (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I74.1 – Embolism and thrombosis of other and unspecified parts of aorta
What it is
I74.1 identifies an embolus or thrombus in the aorta when the site is other than the abdominal or thoracic aorta, or when documentation does not specify the exact aortic segment. Use it for arterial blockage in the aorta itself.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include signs of acute arterial occlusion, reduced blood flow to downstream tissues, pain, or ischemic changes, depending on the affected territory.
When to use this code
Use this code when the provider documents embolism or thrombosis involving the aorta and does not name a more specific aortic location covered by another code. It also fits cases described as “other” or “unspecified” parts of the aorta. Check the note for whether the event is embolic, thrombotic, or both.
Do not use for
Do not use I74.1 if the record clearly identifies a different aortic segment with a more specific code. Do not use it for aneurysm, dissection, or non-aortic vascular occlusion.
Coding tip
Look for the exact aortic site in the provider note before assigning I74.1.