ICD-10 Code G46.4

Cerebellar stroke syndrome

Version 2019 Billable Code

Valid for Submission

G46.4 is a billable code used to specify a medical diagnosis of cerebellar stroke syndrome. The code is valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10: G46.4
Short Description:Cerebellar stroke syndrome
Long Description:Cerebellar stroke syndrome

Code Classification

  • Diseases of the nervous system (G00–G99)
    • Episodic and paroxysmal disorders (G40-G47)
      • Vascular syndromes of brain in cerebrovascular diseases (G46)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (first year ICD-10-CM implemented into the HIPAA mandated 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

Information for Medical Professionals

Convert G46.4 to ICD-9

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

  • 437.8 - Cerebrovasc disease NEC (Approximate Flag)

Synonyms

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

  • Cerebellar infarction
  • Cerebellar stroke syndrome
  • Thrombotic stroke

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 G46.4 are found in the index:


Information for Patients


Cerebellar Disorders

When you play the piano or hit a tennis ball you are activating the cerebellum. The cerebellum is the area of the brain that controls coordination and balance. Problems with the cerebellum include

  • Cancer
  • Genetic disorders
  • Ataxias - failure of muscle control in the arms and legs that result in movement disorders
  • Degeneration - disorders caused by brain cells decreasing in size or wasting away

Treatment of cerebellar disorders depends on the cause. In some cases, there is no cure but treatment may help with symptoms.

NIH: National Institute of Neurological Disorders and Stroke


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Vascular Diseases

What are vascular diseases?

Your vascular system is your body's network of blood vessels. It includes your

  • Arteries, which carry oxygen-rich blood from your heart to your tissues and organs
  • Veins, which carry the blood and waste products back to your heart
  • Capillaries, which are tiny blood vessels that connect your small arteries to your small veins. The walls of the capillaries are thin and leaky, to allow for an exchange of materials between your tissues and blood.

Vascular diseases are conditions which affect your vascular system. They are common and can be serious. Some types include

  • Aneurysm - a bulge or "ballooning" in the wall of an artery
  • Atherosclerosis - a disease in which plaque builds up inside your arteries. Plaque is made up of fat, cholesterol, calcium, and other substances found in the blood.
  • Blood clots, including deep vein thrombosis and pulmonary embolism
  • Coronary artery disease and carotid artery disease, diseases that involve the narrowing or blockage of an artery. The cause is usually a buildup of plaque.
  • Raynaud's disease - a disorder that causes the blood vessels to narrow when you are cold or feeling stressed
  • Stroke - a serious condition that happens when blood flow to your brain stops.
  • Varicose veins - swollen, twisted veins that you can see just under the skin
  • Vasculitis - inflammation of the blood vessels

What causes vascular diseases?

The causes of vascular diseases depend on the specific disease. These causes include

  • Genetics
  • Heart diseases such as high cholesterol and high blood pressure
  • Infection
  • Injury
  • Medicines, including hormones

Sometimes the cause is unknown.

Who is at risk for vascular diseases?

The risk factors for vascular diseases can vary, depending on the specific disease. But some of the more common risk factors include

  • Age - your risk of some diseases goes up as you get older
  • Conditions that can affect the heart and blood vessels, such as diabetes or high cholesterol
  • Family history of vascular or heart diseases
  • Infection or injury that damages your veins
  • Lack of exercise
  • Obesity
  • Pregnancy
  • Sitting or standing still for long periods of time
  • Smoking

What are the symptoms of vascular diseases?

The symptoms for each disease are different.

How are vascular diseases diagnosed?

To make a diagnosis, your health care provider will do a physical exam and ask about your symptoms and medical history. You may have imaging tests and/or blood tests.

How are vascular diseases treated?

Which treatment you get depends on which vascular disease you have and how severe it is. Types of treatments for vascular diseases include

  • Lifestyle changes, such as eating a heart-healthy diet and getting more exercise
  • Medicines, such as blood pressure medicines, blood thinners, cholesterol medicines, and clot-dissolving drugs. In some cases, providers use a catheter to send medicine directly to a blood vessel.
  • Non-surgical procedures, such as angioplasty, stenting, and vein ablation
  • Surgery

Can vascular diseases be prevented?

There are steps you can take to help prevent vascular diseases:

  • Make healthy lifestyle changes, such as eating a heart-healthy diet and getting more exercise
  • Don't smoke. If you are already a smoker, talk to your health care provider for help in finding the best way for you to quit.
  • Keep your blood pressure and cholesterol in check
  • If you have diabetes, control your blood sugar
  • Try not to sit or stand for up long periods of time. If you do need to sit all day, get up and move around every hour or so. If you traveling on a long trip, you can also wear compression stockings and regularly stretch your legs.

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ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 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.