ICD-9 Diagnosis Code 794.02

Abn electroencephalogram

Diagnosis Code 794.02

ICD-9: 794.02
Short Description: Abn electroencephalogram
Long Description: Nonspecific abnormal electroencephalogram [EEG]
This is the 2014 version of the ICD-9-CM diagnosis code 794.02

Code Classification
  • Symptoms, signs, and ill-defined conditions
    • Nonspecific abnormal findings (790-796)
      • 794 Nonspecific abnormal results of function studies

Information for Medical Professionals

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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.
  • R94.01 - Abnormal electroencephalogram [EEG]

  • Alpha amplitude asymmetry
  • Alpha coma type recording
  • Alpha frequency asymmetry
  • Asymmetric beta activity
  • Asymmetric electroencephalogram
  • Asymmetrical mu activity
  • Beta coma type recording
  • Bilateral periodic epileptiform discharges
  • Burst suppression
  • Continuous periodic complexes
  • Dominant alpha activity
  • Dominant beta activity
  • Dominant delta activity
  • Dominant theta activity
  • Electrocerebral silence
  • Electroencephalogram abnormal
  • Electroencephalogram abnormality with seizure
  • Electroencephalogram abnormality without seizure
  • Electroencephalogram artefact
  • Electroencephalogram pattern of uncertain significance
  • Excessive overbreathing response
  • Focal continuous delta activity
  • Focal continuous electroencephalogram abnormality
  • Focal continuous theta activity
  • Focal episodic delta activity
  • Focal episodic electroencephalogram abnormality
  • Focal episodic sharp waves
  • Focal episodic spike wave
  • Focal episodic spike wave with secondary generalization
  • Focal episodic spikes
  • Focal episodic theta activity
  • Focal episodic unilateral three per second spike wave
  • Focal recruiting discharge
  • Focal reduction of electroencephalogram activity
  • Focal rolandic spikes
  • Focal sharp waves
  • Focal spikes
  • Frontal intermittent rhythmic delta activity
  • Generalized atypical spike wave
  • Generalized continuous electroencephalogram abnormality
  • Generalized electroencephalogram amplitude asymmetry
  • Generalized electroencephalogram frequency asymmetry
  • Generalized epileptiform discharges
  • Generalized episodic electroencephalogram abnormality
  • Generalized intermittent delta activity
  • Generalized intermittent theta activity
  • Generalized multifocal spikes
  • Generalized slow spike wave
  • Generalized three per second spike wave
  • Intermittent periodic complexes
  • Light-induced electroencephalogram abnormality
  • Low amplitude electroencephalogram tracing
  • Low amplitude six per second spike wave
  • Low frequency alpha activity
  • Low frequency background activity
  • Low frequency delta activity
  • Low frequency theta activity
  • Occipital intermittent rhythmic delta activity
  • Periodic complexes
  • Periodic lateralized epileptiform discharges
  • Positive spikes
  • Prolonged overbreathing response
  • Rhythmic mid-temporal discharge
  • Small sharp transients during sleep
  • Sound-induced electroencephalogram abnormality
  • Subclinical rhythmical electroencephalogram discharges in adults
  • Temporal slowing
  • Trace alternant electroencephalogram pattern
  • Triphasic waves
  • Unilateral reduction of alpha activity

Index of Diseases and Injuries
References found for the code 794.02 in the Index of Diseases and Injuries:

Information for Patients

Brain Diseases

The brain is the control center of the body. It controls thoughts, memory, speech, and movement. It regulates the function of many organs. When the brain is healthy, it works quickly and automatically. However, when problems occur, the results can be devastating.

Inflammation in the brain can lead to problems such as vision loss, weakness and paralysis. Loss of brain cells, which happens if you suffer a stroke, can affect your ability to think clearly. Brain tumors can also press on nerves and affect brain function. Some brain diseases are genetic. And we do not know what causes some brain diseases, such as Alzheimer's disease.

The symptoms of brain diseases vary widely depending on the specific problem. In some cases, damage is permanent. In other cases, treatments such as surgery, medicines, or physical therapy can correct the source of the problem or improve symptoms.

  • Basal ganglia dysfunction
  • Brain abscess
  • Brain surgery
  • Brain surgery - discharge
  • Central pontine myelinolysis
  • Cerebral spinal fluid (CSF) collection
  • EEG
  • Hepatic encephalopathy
  • Hepatocerebral degeneration
  • Increased intracranial pressure
  • Intraventricular hemorrhage of the newborn
  • Pseudotumor cerebri
  • Subdural hematoma
  • Wernicke-Korsakoff syndrome

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