ICD-9-CM Diagnosis Code 436

Acute, but ill-defined, cerebrovascular disease

Not Valid for Submission

436 is a legacy non-billable code used to specify a medical diagnosis of acute, but ill-defined, cerebrovascular disease. This code was replaced on September 30, 2015 by its ICD-10 equivalent.

ICD-9-CM Code:: 436
ICD-9 Code for:: Cva

Convert 436 to ICD-10-CM

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

I67.89 - Other cerebrovascular disease (approximate) 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.

Code Classification

Diseases of the circulatory system (390–459)
- Cerebrovascular disease (430-438)
  - 436 Acute but ill-defined cerebrovascular disease

Synonyms

References found for the code 436 in the Index of Diseases and Injuries:

Accident accidental SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. condition
- craniovascular SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Apoplectiform convulsions SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Apoplexia apoplexy apoplectic SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- abdominal 569.89
- adrenal 036.3
- attack 436
- basilar SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- brain SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- bulbar SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- capillary SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- cardiac SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Infarct myocardium 410.9
- cerebral SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- chorea SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- congestive SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
  - newborn 767.4
- embolic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Embolism brain 434.1
- fetus 767.0
- fit SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- healed or old V12.54
- heart auricle ventricle SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Infarct myocardium 410.9
- heat 992.0
- hemiplegia SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- hemorrhagic stroke SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Hemorrhage brain 432.9
- ingravescent SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- late effect see Late effect s of cerebrovascular disease
- lung see Embolism pulmonary
- meninges hemorrhagic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Hemorrhage subarachnoid 430
- neonatorum 767.0
- newborn 767.0
- pancreatitis 577.0
- placenta 641.2
- progressive SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- pulmonary artery vein see Embolism pulmonary
- sanguineous SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- seizure SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- serous SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- spleen 289.59
- stroke SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- thrombotic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Thrombosis brain 434.0
- uremic see Uremia
- uteroplacental 641.2

Attack
- apoplectic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- cerebral SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- hemiplegia SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- paralysis SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Catastrophe cerebral SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Chorea gravis minor spasmodic 333.5
- apoplectic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Collapse 780.2
- vascular peripheral 785.59
  - cerebral SEE ALSO See Also
    A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Coma 780.01
- apoplectic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Convulsions idiopathic 780.39
- apoplectiform SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Crisis
- brain cerebral SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Deficit
- neurologic NEC NEC "Not elsewhere classifiable"
  This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular. 781.99
  - due to
    - cerebrovascular lesion SEE ALSO See Also
      A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
      - late effect see Late effect s of cerebrovascular disease

Disaster cerebrovascular SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Disease diseased SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Syndrome
- cerebrovascular NEC NEC "Not elsewhere classifiable"
  This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular. 437.9
  - acute 436
    - embolic see Embolism brain
    - late effect see Late effect s of cerebrovascular disease
    - puerperal postpartum childbirth 674.0
    - thrombotic see Thrombosis brain

Episode
- brain SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- cerebral SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Fit 780.39
- apoplectic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
  - late effect see Late effect s of cerebrovascular disease

Hemiplegia 342.9
- acute SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- apoplectic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
  - late effect or residual
    - affecting
      - dominant side 438.21
      - nondominant side 438.22
      - unspecified side 438.20
- attack SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- due to
  - cerebrovascular lesion SEE ALSO See Also
    A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
    - late effect
      - affecting
        dominant side 438.21
        
        nondominant side 438.22
        
        unspecified side 438.20
- seizure current episode SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Incident cerebrovascular SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Insult
- brain 437.9
  - acute 436
- cerebral 437.9
  - acute 436
- cerebrovascular 437.9
  - acute 436
- vascular NEC NEC "Not elsewhere classifiable"
  This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular. 437.9
  - acute 436

Paralysis paralytic complete incomplete 344.9
- apoplectic current episode SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
  - late effect see Late effect s of cerebrovascular disease
- attack SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- seizure cerebral current episode SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
  - late effect see Late effect s of cerebrovascular disease
- shock SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
  - late effect see Late effect s of cerebrovascular disease

Pregnancy single uterine without sickness V22.2
- complicated by 646.9
  - cerebrovascular disorders conditions classifiable to 430 434 436 437 674.0

Puerperal
- cerebrovascular disorder conditions classifiable to 430 434 436 437 674.0

Seizure s 780.39
- apoplexy apoplectic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- brain or cerebral SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- paralysis SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Shock 785.50
- paralysis paralytic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
  - late effect see Late effect s of cerebrovascular disease

Stroke 434.91
- apoplectic SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Syndrome SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease
- bulbar 335.22
  - lateral SEE ALSO See Also
    A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- dorsolateral medullary SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- lateral
  - medullary SEE ALSO See Also
    A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- posterior
  - inferior cerebellar artery SEE ALSO See Also
    A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- stroke SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
  - little 435.9
- superior
  - cerebellar artery SEE ALSO See Also
    A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436
- Wallenberg s posterior inferior cerebellar artery SEE ALSO See Also
  A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Wallenberg s syndrome posterior inferior cerebellar artery SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Disease cerebrovascular acute 436

Information for Patients

Stroke

What is a stroke?

A stroke happens when there is a loss of blood flow to part of the brain. Your brain cells cannot get the oxygen and nutrients they need from blood, and they start to die within a few minutes. This can cause lasting brain damage, long-term disability, or even death.

If you think that you or someone else is having a stroke, call 911 right away. Immediate treatment may save someone's life and increase the chances for successful rehabilitation and recovery.

What are the types of stroke?

There are two types of stroke:

Ischemic stroke is caused by a blood clot that blocks or plugs a blood vessel in the brain. This is the most common type; about 80% of strokes are ischemic.
Hemorrhagic stroke is caused by a blood vessel that breaks and bleeds into the brain

Another condition that's similar to a stroke is a transient ischemic attack (TIA). It's sometimes called a "mini-stroke." TIAs happen when the blood supply to the brain is blocked for a short time. The damage to the brain cells isn't permanent, but if you have had a TIA, you are at a much higher risk of having a stroke.

Who is at risk for a stroke?

Certain factors can raise your risk of a stroke. The major risk factors include:

High blood pressure. This is the primary risk factor for a stroke.
Diabetes.
Heart diseases. Atrial fibrillation and other heart diseases can cause blood clots that lead to stroke.
Smoking. When you smoke, you damage your blood vessels and raise your blood pressure.
A personal or family history of stroke or TIA.
Age. Your risk of stroke increases as you get older.
Race and ethnicity. African Americans have a higher risk of stroke.

There are also other factors that are linked to a higher risk of stroke, such as:

Alcohol and illegal drug use
Not getting enough physical activity
High cholesterol
Unhealthy diet
Having obesity

What are the symptoms of stroke?

The symptoms of stroke often happen quickly. They include:

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 difficulty walking, dizziness, loss of balance or coordination
Sudden severe headache with no known cause

If you think that you or someone else is having a stroke, call 911 right away.

How are strokes diagnosed?

To make a diagnosis, your health care provider will:

Ask about your symptoms and medical history
Do a physical exam, including a check of
- Your mental alertness
- Your coordination and balance
- Any numbness or weakness in your face, arms, and legs
- Any trouble speaking and seeing clearly
Run some tests, which may include
- Diagnostic imaging of the brain, such as a CT scan or MRI
- Heart tests, which can help detect heart problems or blood clots that may have led to a stroke. Possible tests include an electrocardiogram (EKG) and an echocardiography.

What are the treatments for stroke?

Treatments for stroke include medicines, surgery, and rehabilitation. Which treatments you get depend on the type of stroke and the stage of treatment. The different stages are:

Acute treatment, to try to stop a stroke while it is happening
Post-stroke rehabilitation, to overcome the disabilities caused by the stroke
Prevention, to prevent a first stroke or, if you have already had one, prevent another stroke

Acute treatments for ischemic stroke are usually medicines:

You may get tPA, (tissue plasminogen activator), a medicine to dissolve the blood clot. You can only get this medicine within 4 hours of when your symptoms started. The sooner you can get it, the better your chance of recovery.
If you cannot get that medicine, you may get medicine that helps stop platelets from clumping together to form blood clots. Or you may get a blood thinner to keep existing clots from getting bigger.
If you have carotid artery disease, you may also need a procedure to open your blocked carotid artery

Acute treatments for hemorrhagic stroke focus on stopping the bleeding. The first step is to find the cause of bleeding in the brain. The next step is to control it:

If high blood pressure is the cause of bleeding, you may be given blood pressure medicines.
If an aneurysm if the cause, you may need aneurysm clipping or coil embolization. These are surgeries to prevent further leaking of blood from the aneurysm. It also can help prevent the aneurysm from bursting again.
If an arteriovenous malformation (AVM) is the cause of a stroke, you may need an AVM repair. An AVM is a tangle of faulty arteries and veins that can rupture within the brain. An AVM repair may be done through
- Surgery
- Injecting a substance into the blood vessels of the AVM to block blood flow
- Radiation to shrink the blood vessels of the AVM

Stroke rehabilitation can help you relearn skills you lost because of the damage. The goal is to help you become as independent as possible and to have the best possible quality of life.

Prevention of another stroke is also important, since having a stroke increases the risk of getting another one. Prevention may include heart-healthy lifestyle changes and medicines.

Can strokes be prevented?

If you have already had a stroke or are at risk of having a stroke, you can make some heart-healthy lifestyle changes to try to prevent a future stroke:

Eating a heart-healthy diet
Aiming for a healthy weight
Managing stress
Getting regular physical activity
Quitting smoking
Managing your blood pressure and cholesterol levels

If these changes aren't enough, you may need medicine to control your risk factors.

NIH: National Institute of Neurological Disorders and Stroke

[Read More]

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.

Index of Diseases and Injuries Definitions

And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
Type 1 Excludes Notes - A type 1 Excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
Inclusion terms - List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.