ICD-10-CM Code I63.23

Cerebral infarction due to unspecified occlusion or stenosis of carotid arteries

Version 2021 Non-Billable Code

Not Valid for Submission

I63.23 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of cerebral infarction due to unspecified occlusion or stenosis of carotid arteries. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions.

ICD-10:I63.23
Short Description:Cerebral infrc due to unsp occls or stenosis of carotid art
Long Description:Cerebral infarction due to unspecified occlusion or stenosis of carotid arteries

Consider the following ICD-10 codes with a higher level of specificity:

  • I63.231 - Cerebral infarction due to unspecified occlusion or stenosis of right carotid arteries
  • I63.232 - Cerebral infarction due to unspecified occlusion or stenosis of left carotid arteries
  • I63.233 - Cerebral infarction due to unspecified occlusion or stenosis of bilateral carotid arteries
  • I63.239 - Cerebral infarction due to unspecified occlusion or stenosis of unspecified carotid artery

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I63.23 are found in the index:


Code Classification

  • Diseases of the circulatory system (I00–I99)
    • Cerebrovascular diseases (I60-I69)
      • Cerebral infarction (I63)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients


Ischemic Stroke

Also called: Embolic Stroke, Thrombotic stroke

A stroke is a medical emergency. There are two types - ischemic and hemorrhagic. Ischemic stroke is the most common type. It is usually caused by a blood clot that blocks or plugs a blood vessel in the brain. This keeps blood from flowing to the brain. Within minutes, brain cells begin to die. Another cause is stenosis, or narrowing of the artery. This can happen because of atherosclerosis, a disease in which plaque builds up inside your arteries. Transient ischemic attacks (TIAs) occur when the blood supply to the brain is interrupted briefly. Having a TIA can mean you are at risk for having a more serious stroke.

Symptoms of stroke are

  • Sudden numbness or weakness of the face, arm or leg (especially on one side of the body)
  • Sudden confusion, trouble speaking or understanding speech
  • Sudden trouble seeing in one or both eyes
  • Sudden trouble walking, dizziness, loss of balance or coordination
  • Sudden severe headache with no known cause

It is important to treat strokes as quickly as possible. Blood thinners may be used to stop a stroke while it is happening by quickly dissolving the blood clot. Post-stroke rehabilitation can help people overcome disabilities caused by stroke damage.

NIH: National Institute of Neurological Disorders and Stroke

  • Preventing stroke (Medical Encyclopedia)
  • Stroke - discharge (Medical Encyclopedia)
  • Thrombolytic therapy (Medical Encyclopedia)

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