ICD-10 Code I65.22 – Occlusion and stenosis of left carotid artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I65.22 – Occlusion and stenosis of left carotid artery
What it is
I65.22 identifies narrowing or blockage of the left carotid artery, usually from atherosclerotic disease. Use it when documentation specifies the left side and a stenotic or occlusive process.
Clinical signs
Patients may be asymptomatic or have neurologic symptoms related to reduced cerebral blood flow. Clinical features vary; refer to documentation, especially if imaging confirms left carotid narrowing or occlusion.
When to use this code
Use this code when the record clearly states left carotid artery stenosis or occlusion, with or without symptoms. It is appropriate for documented carotid disease found on ultrasound, CTA, MRA, or angiography. Code the left-sided finding only when laterality is specified.
Do not use for
Do not use I65.22 for carotid disease on the right, bilateral disease, or unspecified side. Check documentation if the note describes transient ischemic attack, stroke, or carotid dissection instead of stenosis.
Coding tip
Confirm laterality and whether the finding is stenosis or complete occlusion before assigning I65.22.