Valid for Submission
I65.21 is a billable diagnosis code used to specify a medical diagnosis of occlusion and stenosis of right carotid artery. The code I65.21 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code I65.21 might also be used to specify conditions or terms like carotid artery embolism, carotid artery occlusion, carotid artery thrombosis, carotid artery thrombosis, embolism of precerebral artery , internal carotid artery stenosis, etc.
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 occlusion
- Carotid artery thrombosis
- Carotid artery thrombosis
- Embolism of precerebral artery
- Internal carotid artery stenosis
- Occlusive embolus of right carotid artery
- Right carotid artery occlusion
- Right carotid artery stenosis
- Stenosis of cavernous portion of right internal carotid artery
- Thrombosis of internal carotid artery
- Thrombosis of right carotid artery
- Thrombosis of right internal carotid artery
Convert I65.21 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code I65.21 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
Information for Patients
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
- 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
- Angioplasty and stent placement - carotid artery (Medical Encyclopedia)
- Carotid artery disease (Medical Encyclopedia)
- Carotid artery stenosis -- self-care (Medical Encyclopedia)
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- Carotid artery surgery - discharge (Medical Encyclopedia)
- Carotid duplex (Medical Encyclopedia)