Aneurysm of the aortic arch, without rupture

This code describes a localized, permanent dilation of the aortic arch, which is the curved segment of the aorta that branches into the head and arms, without evidence of a tear or breach in the vessel wall. This condition can be congenital or acquired due to factors like atherosclerosis or hypertension.

Use this code when documentation explicitly states an aneurysm located in the aortic arch and confirms the absence of rupture. This typically applies to patients diagnosed via imaging studies such as CT angiography, MRI, or echocardiography.

• Always confirm the specific anatomical location of the aneurysm (e.g., ascending, arch, descending) as distinct codes exist for each.
• Ensure documentation clearly states "without rupture" to avoid miscoding with ruptured aortic aneurysms.
• Code any associated underlying conditions, such as atherosclerosis or Marfan syndrome, as additional diagnoses.