R94.01
BillableAbnormal electroencephalogram [EEG]
Abnormal electroencephalogram [EEG]
Coding Notes
Includes
Conditions included under this code
- nonspecific abnormal findings on diagnostic imaging by computerized axial tomography [CAT scan]
- nonspecific abnormal findings on diagnostic imaging by magnetic resonance imaging [MRI][NMR]
- nonspecific abnormal findings on diagnostic imaging by positron emission tomography [PET scan]
- nonspecific abnormal findings on diagnostic imaging by thermography
- nonspecific abnormal findings on diagnostic imaging by ultrasound [echogram]
- nonspecific abnormal findings on diagnostic imaging by X-ray examination
- abnormal results of radionuclide [radioisotope] uptake studies
- abnormal results of scintigraphy
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- abnormal findings on antenatal screening of mother (O28.-)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
Also Known As / Clinical Terms
SNOMED CT
- Cerebral death by EEG13500002
- Electrocerebral silence13500002
- Flat EEG13500002
- Respirator brain death13500002
- EEG abnormality without seizure18259008
- Electroencephalogram abnormality without seizure18259008
- Light-induced EEG abnormality41716002
- Light-induced electroencephalogram abnormality41716002
- EEG abnormality with seizure43400009
- Electroencephalogram abnormality with seizure43400009
- Sound-induced EEG abnormality66806007
- Sound-induced electroencephalogram abnormality66806007
- EEG artefact251442008
- EEG artifact251442008
- Electroencephalogram artefact251442008
- Electroencephalogram artifact251442008
- EEG artefact - patient movement251443003
- EEG artifact - patient movement251443003
- Electroencephalogram artefact - patient movement251443003
- Electroencephalogram artifact - patient movement251443003
- EEG artefact - technical problems251444009
- EEG artifact - technical problems251444009
- Electroencephalogram artefact - technical problems251444009
- Electroencephalogram artifact - technical problems251444009
- Dominant alpha activity251446006
- Dominant beta activity251447002
- Dominant theta activity251448007
- Dominant delta activity251449004
- EEG pattern of uncertain significance251450004
- Electroencephalogram pattern of uncertain significance251450004
- Positive spikes (including 14 and 6 per second)251451000
- Low amplitude 6/s spike wave251452007
- Low amplitude six per second spike wave251452007
- Small sharp transients during sleep251453002
- SREDA - Subclinical rhythmical EEG discharges in adults251454008
- Subclinical rhythmical EEG discharges in adults251454008
- Subclinical rhythmical electroencephalogram discharges in adults251454008
- RMTD - Rhythmic mid-temporal discharge251455009
- Rhythmic mid-temporal discharge251455009
- Asymmetrical mu activity251456005
- Trace alternant EEG pattern251457001
- Trace alternant electroencephalogram pattern251457001
- Generalised continuous EEG abnormality251458006
- Generalised continuous electroencephalogram abnormality251458006
- Generalised non-paroxysmal EEG abnormality251458006
- Generalized continuous EEG abnormality251458006
- Generalized continuous electroencephalogram abnormality251458006
- Generalized non-paroxysmal EEG abnormality251458006
- Low frequency background activity251459003
- Low frequency alpha activity251460008
- Low frequency theta activity251461007
- Low frequency delta activity251462000
- Periodic complexes251463005
- Continuous periodic complexes251464004
- Intermittent periodic complexes251465003
- Triphasic waves251466002
- Alpha coma type recording251467006
- Beta coma type recording251468001
- Burst suppression251469009
- Loss of reactivity251470005
- Low amplitude EEG tracing251471009
- Low amplitude electroencephalogram tracing251471009
- Isoelectric recording251472002
- Generalised episodic EEG abnormality251473007
- Generalised episodic electroencephalogram abnormality251473007
- Generalised paroxysmal EEG abnormality251473007
- Generalized episodic EEG abnormality251473007
- Generalized episodic electroencephalogram abnormality251473007
- Generalized paroxysmal EEG abnormality251473007
- Generalised epileptiform discharges251474001
- Generalized epileptiform discharges251474001
- Generalised 3/s spike wave251475000
- Generalised three per second spike wave251475000
- Generalized 3/s spike wave251475000
- Generalized three per second spike wave251475000
- Generalised slow spike wave (less than three per second)251476004
- Generalized slow spike wave (less than three per second)251476004
- Generalised atypical spike wave251477008
- Generalized atypical spike wave251477008
- Generalised multifocal spikes251478003
- Generalized multifocal spikes251478003
- BIPLEDS - Bilateral periodic epileptiform discharges251479006
- Bilateral periodic epileptiform discharges251479006
- Generalised intermittent theta activity251480009
- Generalized intermittent theta activity251480009
- Generalised intermittent delta activity251481008
- Generalized intermittent delta activity251481008
- Excessive overbreathing response251482001
- Prolonged overbreathing response251483006
- Focal continuous EEG abnormality251485004
- Focal continuous electroencephalogram abnormality251485004
- Focal continuous theta activity251486003
- Focal continuous delta activity251487007
- Focal sharp waves251488002
- Focal spikes251489005
- Focal rolandic spikes251491002
- PLEDS - Periodic lateralised epileptiform discharges251492009
- PLEDS - Periodic lateralized epileptiform discharges251492009
- Periodic lateralised epileptiform discharges251492009
- Periodic lateralized epileptiform discharges251492009
- Focal reduction of EEG activity251493004
- Focal reduction of electroencephalogram activity251493004
- Focal episodic EEG abnormality251495006
- Focal episodic electroencephalogram abnormality251495006
- Focal episodic theta activity251496007
- Focal episodic delta activity251497003
- FIRDA - Frontal intermittent rhythmic delta activity251499000
- Frontal intermittent rhythmic delta activity251499000
- OIRDA - intermittent rhythmic delta activity251500009
- Occipital intermittent rhythmic delta activity251500009
- Focal episodic sharp waves251501008
- Focal episodic spikes251502001
- Focal episodic spike wave251503006
- Focal episodic spike wave with secondary generalisation251505004
- Focal episodic spike wave with secondary generalization251505004
- Focal recruiting discharge251506003
- Asymmetric EEG251508002
- Asymmetric electroencephalogram251508002
- Alpha amplitude asymmetry251509005
- Alpha frequency asymmetry251510000
- Generalised EEG amplitude asymmetry251511001
- Generalised electroencephalogram amplitude asymmetry251511001
- Generalized EEG amplitude asymmetry251511001
- Generalized electroencephalogram amplitude asymmetry251511001
- Generalised EEG frequency asymmetry251512008
- Generalised electroencephalogram frequency asymmetry251512008
- Generalized EEG frequency asymmetry251512008
- Generalized electroencephalogram frequency asymmetry251512008
- Asymmetric beta activity251513003
- EEG abnormal274521009
- Electroencephalogram abnormal274521009
- Finding of generalised electroencephalogram pattern364852004
- Finding of generalized electroencephalogram pattern364852004
- Generalised EEG pattern - finding364852004
- Generalized EEG pattern - finding364852004
- Dominant EEG frequency - finding364863001
- Finding of dominant electroencephalogram frequency364863001
- EEG symmetry - finding364885007
- Finding of electroencephalogram symmetry364885007
- Cafe-au-lait macules with temporal dysrhythmia403821004
- Café-au-lait macules with temporal dysrhythmia403821004
- Temporal slowing417621006
- Reduction of alpha activity in left cerebral hemisphere1119388009
- Reduction of alpha activity in right cerebral hemisphere1119389001
UMLS
- eeg abnormalC0151611
- Abnormal EEGC0151611
- Abnormal ElectroencephalogramC0151611
- Abnormal electroencephalogramC0151611
- Abnormal electroencephalogram [EEG]C0151611
- Disorder EEG (NOS)C0151611
- EEG abnormalC0151611
- EEG abnormalitiesC0151611
- EEG abnormalityC0151611
- Electroencephalogram (EEG) abnormalitiesC0151611
- Electroencephalogram abnormalC0151611
- Electroencephalogram abnormal (finding)C0151611
- Electroencephalogram abnormalitiesC0151611
- abnormal eegC0151611
- abnormality eegC0151611
- eeg abnormalityC0151611
- electroencephalogram abnormalC0151611
Frequently Asked Questions
What is the ICD-10 code for abnormal electroencephalogram [eeg]?
The ICD-10-CM code for abnormal electroencephalogram [eeg] is R94.01. The full clinical description is "Abnormal electroencephalogram [EEG]". R94.01 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code R94.01 mean?
ICD-10-CM code R94.01 represents "Abnormal electroencephalogram [EEG]". It is classified under Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings and is a billable/specific code that can be used on a claim.
Is R94.01 a billable code?
Yes, R94.01 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is R94.01 in?
R94.01 is in Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (codes R00-R99).
What codes cannot be used with R94.01?
R94.01 has Excludes1 notes indicating codes that cannot be used together with it, including: abnormal findings on antenatal screening of mother (O28.-); diagnostic abnormal findings classified elsewhere - see Alphabetical Index.
What SNOMED CT codes does R94.01 map to?
R94.01 maps to 78 SNOMED CT concepts: 251509005, 251467006, 251510000, 251508002, 251513003, and 73 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for R94.01?
R94.01 is linked to 1 UMLS Concept Unique Identifier: C0151611. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.