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Diagnosis Code

R94.01 ABNORMAL ELECTROENCEPHALOGRAM [EEG]


Code Information

Diagnosis Code: R94.01

Short Description: Abnormal electroencephalogram [EEG]

Long Description: Abnormal electroencephalogram [EEG]

The code R94.01 is VALID for claim submission

Code Classification:

  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99)
    • Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)
      • Abnormal results of function studies (R94)
        • R94.01 Abnormal electroencephalogram [EEG]

Code Version: 2022 ICD-10-CM


Synonyms

  • Alpha amplitude asymmetry
  • Alpha coma type recording
  • Alpha frequency asymmetry
  • Asymmetric beta activity
  • Asymmetric EEG
  • Asymmetrical mu activity
  • Beta coma type recording
  • Bilateral periodic epileptiform discharges
  • Burst suppression
  • Café-au-lait macules with temporal dysrhythmia
  • Continuous periodic complexes
  • Dominant alpha activity
  • Dominant beta activity
  • Dominant delta activity
  • Dominant EEG frequency - finding
  • Dominant EEG frequency - finding
  • Dominant EEG frequency - finding
  • Dominant EEG frequency - finding
  • Dominant theta activity
  • EEG abnormality with seizure
  • EEG abnormality without seizure
  • EEG artifact
  • EEG artifact - patient movement
  • EEG artifact - technical problems
  • EEG pattern of uncertain significance
  • EEG pattern of uncertain significance
  • EEG pattern of uncertain significance
  • EEG pattern of uncertain significance
  • EEG pattern of uncertain significance
  • EEG pattern of uncertain significance
  • EEG symmetry - finding
  • EEG symmetry - finding
  • EEG symmetry - finding
  • EEG symmetry - finding
  • EEG symmetry - finding
  • EEG symmetry - finding
  • Electrocerebral silence
  • Electroencephalogram abnormal
  • Excessive overbreathing response
  • Focal continuous delta activity
  • Focal continuous EEG abnormality
  • Focal continuous theta activity
  • Focal episodic delta activity
  • Focal episodic EEG abnormality
  • Focal episodic sharp waves
  • Focal episodic spike wave
  • Focal episodic spike wave with secondary generalization
  • Focal episodic spikes
  • Focal episodic theta activity
  • Focal recruiting discharge
  • Focal reduction of EEG activity
  • Focal rolandic spikes
  • Focal sharp waves
  • Focal spikes
  • Frontal intermittent rhythmic delta activity
  • Generalized atypical spike wave
  • Generalized continuous EEG abnormality
  • Generalized EEG amplitude asymmetry
  • Generalized EEG frequency asymmetry
  • Generalized EEG pattern - finding
  • Generalized EEG pattern - finding
  • Generalized EEG pattern - finding
  • Generalized EEG pattern - finding
  • Generalized epileptiform discharges
  • Generalized episodic EEG 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
  • Isoelectric recording
  • Light-induced EEG abnormality
  • Loss of reactivity
  • Low amplitude EEG 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
  • Reduction of alpha activity in left cerebral hemisphere
  • Reduction of alpha activity in right cerebral hemisphere
  • Rhythmic mid-temporal discharge
  • Small sharp transients during sleep
  • Sound-induced EEG abnormality
  • Subclinical rhythmical EEG discharges in adults
  • Temporal slowing
  • Trace alternant EEG pattern
  • Triphasic waves

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
R94.01 Right Arrow 794.02 Abn electroencephalogram

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
R94 Abnormal results of function studies
R94.0 Abnormal results of function studies of central nervous system
R94.02 Abnormal brain scan
R94.09 Abnormal results of other function studies of central nervous system
R94.1 Abnormal results of function studies of peripheral nervous system and special senses
R94.11 Abnormal results of function studies of eye
R94.110 Abnormal electro-oculogram [EOG]
R94.111 Abnormal electroretinogram [ERG]
R94.112 Abnormal visually evoked potential [VEP]
R94.113 Abnormal oculomotor study
R94.118 Abnormal results of other function studies of eye
R94.12 Abnormal results of function studies of ear and other special senses
R94.120 Abnormal auditory function study
R94.121 Abnormal vestibular function study
R94.128 Abnormal results of other function studies of ear and other special senses
R94.13 Abnormal results of function studies of peripheral nervous system
R94.130 Abnormal response to nerve stimulation, unspecified
R94.131 Abnormal electromyogram [EMG]
R94.138 Abnormal results of other function studies of peripheral nervous system
R94.2 Abnormal results of pulmonary function studies
R94.3 Abnormal results of cardiovascular function studies
R94.30 Abnormal result of cardiovascular function study, unspecified
R94.31 Abnormal electrocardiogram [ECG] [EKG]
R94.39 Abnormal result of other cardiovascular function study
R94.4 Abnormal results of kidney function studies
R94.5 Abnormal results of liver function studies
R94.6 Abnormal results of thyroid function studies
R94.7 Abnormal results of other endocrine function studies
R94.8 Abnormal results of function studies of other organs and systems

This page was last updated on: 10/1/2023

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