Tortuous aortic arch

This code describes an anatomical variation of the aorta where the aortic arch exhibits an abnormal degree of curvature or angulation, appearing twisted or excessively bent rather than its typical smooth, gentle curve. This tortuosity can affect blood flow dynamics and may be associated with other cardiovascular conditions.

Use this code when diagnostic imaging, such as CT angiography, MRI, or echocardiography, explicitly documents a tortuous aortic arch. This finding is often incidental but can be clinically significant in patients presenting with symptoms related to vascular compression or in pre-surgical planning.

• Ensure documentation clearly specifies "tortuous aortic arch" and not just a dilated or elongated aorta.
• Do not confuse with coarctation of the aorta (Q25.1) or hypoplasia of the aorta (Q25.3), which are distinct structural anomalies.
• Consider sequencing this code as a secondary diagnosis if the tortuosity is an incidental finding or contributes to, but is not the primary reason for, the patient's encounter.