ICD-10-CM Code I63.523

Cerebral infarction due to unspecified occlusion or stenosis of bilateral anterior cerebral arteries

Version 2021 Billable Code

Valid for Submission

I63.523 is a billable code used to specify a medical diagnosis of cerebral infarction due to unspecified occlusion or stenosis of bilateral anterior cerebral arteries. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions.

ICD-10:I63.523
Short Description:Cereb infrc due to unsp occls or stenos of bi ant cereb art
Long Description:Cerebral infarction due to unspecified occlusion or stenosis of bilateral anterior cerebral arteries

Replacement Code

I63523 replaces the following previously assigned ICD-10 code(s):

  • I63.521 - Cereb infrc d/t unsp occls or stenos of right ant cereb art
  • I63.522 - Cereb infrc d/t unsp occls or stenos of left ant cereb art

Convert I63.523 to ICD-9

  • 434.91 - Crbl art ocl NOS w infrc (Approximate Flag)

Code Classification

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

Code History

  • 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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