Aortic arch syndrome [Takayasu]

This code represents Takayasu arteritis, a rare, chronic inflammatory disease primarily affecting the aorta and its major branches, leading to stenosis, occlusion, or aneurysm formation. It is also known as aortic arch syndrome, as the great vessels originating from the aortic arch are frequently involved. The condition can cause reduced blood flow to various organs and extremities.

Use this code when documentation clearly indicates a diagnosis of Takayasu arteritis or aortic arch syndrome due to this inflammatory condition. Supporting documentation will often include imaging findings (e.g., angiography, MRI, CT) showing characteristic vessel changes, along with clinical signs and symptoms such as claudication, pulse deficits, or bruits.

• Ensure the documentation specifies Takayasu arteritis as the underlying cause of the aortic arch syndrome, as other conditions can cause similar symptoms.
• Code any associated manifestations or complications, such as hypertension or organ ischemia, separately.
• Do not confuse with non-inflammatory causes of aortic arch syndrome, which would require different codes.