ICD-10-CM > I00-I99 > I60-I69 > I65 > I65.0 I65.0 Occlusion and stenosis of vertebral artery Non-Billable/Non-Specific Codes I65.01Occlusion and stenosis of right vertebral arteryI65.02Occlusion and stenosis of left vertebral arteryI65.03Occlusion and stenosis of bilateral vertebral arteriesI65.09Occlusion and stenosis of unspecified vertebral artery