I77.71
BillableDissection of carotid artery
HCC Category Mapping
V24HCC 107 — Vascular Disease with Complications
0.450ESRDHCC 107 — Vascular Disease with Complications
0.000What This Code Means
A tear in the inner lining of the carotid artery in the neck, which can reduce blood flow to the brain and increase stroke risk.
Coding Tips
- •Specify laterality (right or left) when documented for more precise coding
- •Often associated with neck trauma, sudden head turning, or can occur spontaneously
Clinical Significance
Dissection of the carotid artery is a critical vascular condition that poses significant stroke risk due to the carotid artery's role in supplying blood to the brain. This condition requires urgent evaluation and management to prevent cerebrovascular events. It reflects high clinical complexity and ongoing monitoring needs, mapping to the higher-weighted vascular disease with complications category.
Documentation Requirements
- ✓Imaging confirmation of carotid artery dissection (CT angiography, magnetic resonance angiography, or ultrasound)
- ✓Laterality — right, left, or bilateral carotid involvement
- ✓Acuity — acute, subacute, or chronic/healed status
- ✓Neurological assessment including presence or absence of stroke symptoms
- ✓Treatment plan including anticoagulation, antiplatelet therapy, or surgical intervention
- ✓Follow-up imaging schedule to monitor healing or progression
Commonly Confused Codes
I77.70 — Dissection of unspecified artery: less specific; use I77.71 when carotid is documentedI65.2x — Occlusion and stenosis of carotid artery: use for atherosclerotic narrowing, not dissectionI71.01 — Dissection of thoracic aorta: different vessel entirelyI67.0 — Dissection of cerebral arteries: for intracranial arteries, not extracranial carotid
Code Hierarchy
└I77Other disorders of arteries and arterioles└I77.7Other arterial dissection└I77.71Dissection of carotid artery
└I77.71Dissection of carotid artery