I77.79

HCC Category Mapping

What This Code Means

A tear in the inner lining of an artery (other than the major arteries like the carotid or vertebral) that allows blood to seep between the layers of the artery wall. This can reduce blood flow through the artery and potentially cause serious complications.

Coding Tips

• •Verify the specific artery involved in the dissection, as this code is for arteries not specified elsewhere - if it's a carotid or vertebral artery, use the more specific codes I77.71 or I77.75 instead
• •Document whether the dissection is spontaneous or traumatic, and whether it's causing any complications like thrombosis or rupture, as these may require additional codes

Clinical Significance

Dissection of other specified artery captures arterial dissections in vessels not classified under the more specific I77.71-I77.77 codes, such as mesenteric, hepatic, or splenic arteries. These dissections can compromise organ perfusion and require urgent vascular evaluation. The condition reflects significant clinical complexity warranting the higher vascular disease with complications classification.

Documentation Requirements

• ✓Imaging confirmation of the arterial dissection
• ✓Identification of the specific artery involved
• ✓Clinical presentation and symptoms related to the dissection
• ✓Etiology — spontaneous, traumatic, connective tissue disorder, or iatrogenic
• ✓Assessment of end-organ perfusion affected by the dissection
• ✓Treatment plan and follow-up monitoring schedule

Commonly Confused Codes