2024 ICD-10-CM Diagnosis Code I65.22

Occlusion and stenosis of left carotid artery

ICD-10-CM Code:
ICD-10 Code for:
Occlusion and stenosis of left carotid artery
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Code Navigator:

Code Classification

  • Diseases of the circulatory system
    • Cerebrovascular diseases
      • Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

I65.22 is a billable diagnosis code used to specify a medical diagnosis of occlusion and stenosis of left carotid artery. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Carotid artery embolism
  • Carotid artery embolism
  • Carotid artery obstruction
  • Carotid artery obstruction
  • Carotid artery occlusion
  • Carotid artery occlusion
  • Carotid artery thrombosis
  • Carotid artery thrombosis
  • Embolism of left carotid artery
  • Left carotid artery occlusion
  • Left carotid artery stenosis
  • Occlusive embolus of left carotid artery
  • Thrombosis of internal carotid artery
  • Thrombosis of left carotid artery
  • Thrombosis of left internal carotid artery

Clinical Classification

Clinical Information

  • Carotid Artery Thrombosis

    blood clot formation in any part of the carotid arteries. this may produce carotid stenosis or occlusion of the vessel, leading to transient ischemic attack; cerebral infarction; or amaurosis fugax.

Convert I65.22 to ICD-9-CM

  • ICD-9-CM Code: 433.10 - Ocl crtd art wo infrct
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education

Carotid Artery Disease

Your carotid arteries are two large blood vessels in your neck. They supply your brain and head with blood. If you have carotid artery disease, the arteries become narrow or blocked, usually because of atherosclerosis. Atherosclerosis is the buildup of plaque, which is made up of fat, cholesterol, calcium, and other substances found in the blood.

Carotid artery disease is serious because it can block the blood flow to your brain, causing a stroke. Too much plaque in the artery can cause a blockage. You can also have a blockage when a piece of plaque or a blood clot breaks off the wall of an artery. The plaque or clot can travel through the bloodstream and get stuck in one of your brain's smaller arteries.

Carotid artery disease often does not cause symptoms until the blockage or narrowing is severe. One sign may be a bruit (whooshing sound) that your doctor hears when listening to your artery with a stethoscope. Another sign is a transient ischemic attack (TIA), a "mini-stroke." A TIA is like a stroke, but it only lasts a few minutes, and the symptoms usually go away within an hour. Stroke is another sign.

Imaging tests can confirm whether you have carotid artery disease.

Treatments may include:

  • Healthy lifestyle changes
  • Medicines
  • Carotid endarterectomy, surgery to remove the plaque
  • Angioplasty, a procedure to place a balloon and stent into the artery to open it and hold it open

NIH: National Heart, Lung, and Blood Institute

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.