ICD-9 Code 433.21

Occlusion and stenosis of vertebral artery with cerebral infarction

Not Valid for Submission

433.21 is a legacy non-billable code used to specify a medical diagnosis of occlusion and stenosis of vertebral artery with cerebral infarction. This code was replaced on September 30, 2015 by its ICD-10 equivalent.

ICD-9: 433.21
Short Description:Ocl vrtb art w infrct
Long Description:Occlusion and stenosis of vertebral artery with cerebral infarction

Convert 433.21 to ICD-10

The following crosswalk between ICD-9 to ICD-10 is based based on the General Equivalence Mappings (GEMS) information:

  • I63.019 - Cerebral infarction due to thombos unsp vertebral artery
  • I63.119 - Cerebral infarction due to embolism of unsp vertebral artery
  • I63.219 - Cereb infrc due to unsp occls or stenosis of unsp verteb art

Code Classification

  • Diseases of the circulatory system (390–459)
    • Cerebrovascular disease (430-438)
      • 433 Occlusion and stenosis of precerebral arteries

Information for Medical Professionals

Synonyms

  • Cerebral infarction due to vertebral artery occlusion

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
  • Stroke - discharge
  • Thrombolytic therapy

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ICD-9 Footnotes

General Equivalence Map Definitions
The ICD-9 and ICD-10 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.