Dissection of artery of upper extremity

This code describes a spontaneous or traumatic tear in the inner lining of an artery supplying the upper limb, leading to blood accumulation within the arterial wall. This intramural hematoma can compromise blood flow, potentially causing ischemia to the arm or hand. It is a serious vascular event requiring prompt diagnosis and management.

Assign this code when documentation clearly indicates an arterial dissection affecting the upper extremity, such as the subclavian, axillary, brachial, radial, or ulnar arteries. This typically occurs in patients presenting with acute arm pain, paresthesia, pallor, or pulselessness, often following trauma or in those with underlying connective tissue disorders. Supporting documentation includes imaging reports (e.g., CTA, MRA, ultrasound) confirming the dissection.

• Specify laterality (left, right, or bilateral) if documented.
• Distinguish from arterial occlusions or aneurysms, which have separate codes.
• Code any associated complications, such as ischemia or infarction, in addition to the dissection.