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    OpenPayerBilling CodesOther EEG Testing ProceduresCPT cpt-95957-computer-based-eeg-analysis
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    CPT 95957: Computer-Based Analysis of Electroencephalogram

    Medicare pays $215 on average nationally for this procedure.

    CPT code 95957 describes a computer-based analysis of an electroencephalogram (EEG), a diagnostic service that applies automated or semi-automated software to EEG recordings to quantify waveforms, detect abnormalities, and generate analytic reports; the service type is diagnostic neurophysiology analysis, typically performed in an electrodiagnostic laboratory, hospital neurophysiology unit, or outpatient neurology clinic during or after EEG acquisition.

    For related coverage guidance, see recent payer policy updates: Clinical Review Criteria Intraoperative Neurophysiological Monitoring (IONM), Remote Electrical Neuromodulation for Migraines (i.e., Nerivio®), Lumbar Microdiscectomy.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is a 28-year-old adult referred by neurology for computer-based analysis of a routine or prolonged electroencephalogram. Indications include evaluation of new-onset seizures, change in seizure frequency, altered mental status, suspected nonconvulsive status epilepticus, or pre-surgical epilepsy mapping. The EEG technologist performs the recording (routine 20–60 minutes or extended 24–72 hour ambulatory monitoring) with standard electrode placement; the interpreting physician (often a neurologist or clinical neurophysiologist) later performs a software-assisted quantitative review and reporting of EEG data using automated algorithms for spike detection, frequency analysis, and trend reports. The workflow typically includes: scheduling and consent, electrode application, EEG acquisition, artifact review, computer-based signal processing and quantitative analysis, physician review of the computer outputs, and generation of a formal report documenting interpretation and clinical correlation.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    95816Electroencephalogram (EEG) during sleep or sleep-deprived recordingOften performed before computer-based analysis; provides the raw recording that is analyzed with 95957.
    95819EEG with video monitoring, awake and drowsy, 21–30 electrodesVideo-EEG recordings supply synchronized clinical video used alongside computerized analysis.
    95956Computer-based EEG interpretation; extended or serial computerized analysis (if applicable)Related analytic services that may be reported for additional or prolonged quantitative processing.
    95950EEG, routine awake and drowsyRoutine EEG recordings commonly precede the computer-based analysis billed with 95957.
    95970Magnetoencephalography (MEG) source localizationPerformed in some centers as complementary advanced neurophysiologic analysis for epilepsy surgery planning, often integrated with EEG analysis.

    Related Modifiers

    8 rows

    ModifierDescriptionWhen to Use
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    27Modifier 27 indicates a separate, subsequent outpatient hospital E/M service provided to the same patient on the same date by a different provider in a hospital outpatient setting. It is a…- Use modifier -27 on facility (hospital outpatient/ambulatory service center) claims to report a subsequent, separate, and distinct outpatient E/M service provided to the same patient on the same…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    2084P0800X
    2084N0400X
    207RG0100X
    207L00000X
    302F00000X
    152WV0400X
    207VX0000X
    103TA0400X

    Related Payer Policy Updates

    Specialty: Neurology/Neurosurgery1 / 3

    10 rows

    PolicyPayerEffective Date
    Clinical Review Criteria Intraoperative Neurophysiological Monitoring (IONM)Kaiser Permanente2027-01-01
    Remote Electrical Neuromodulation for Migraines (i.e., Nerivio®)bcbsvermont2026-11-01
    Lumbar Microdiscectomyuniverahealthcare2026-10-15
    Artificial Cervical Intervertebral Discuniverahealthcare2026-10-15
    Lumbar Decompressionuniverahealthcare2026-10-15
    Responsive Neurostimulation for Focal EpilepsyPremera Bluecross2026-10-14
    Intraoperative MonitoringProvidence Health Plan2026-10-01
    Intraoperative MonitoringProvidence Health Plan2026-10-01
    High-Intensity Focused UltrasoundMass General Brigham Health Plan2026-10-01
    Vagal Nerve StimulationAmbetter Nevada2026-10-01

    Related Codes

    CPT-95954-EEG-ACTIVATION-WITH-PROVIDER-ATTENDANCE

    CPT 95954: EEG Activation with Drug or Physical Stimulation

    CPT-95955-INTRAOPERATIVE-EEG-MONITORING-NONINTRACRANIAL-SURGERY

    CPT 95955: Intraoperative EEG Monitoring During Nonintracranial Surgery

    CPT-95958-WADA-ACTIVATION-TEST-EEG-MONITORING

    CPT 95958: Wada Activation Test with EEG Monitoring

    CPT-95961-INTRACRANIAL-SEIZURE-LOCALIZATION-BRAIN-MAPPING

    CPT 95961: Intracranial EEG Mapping for Seizure Localization

    CPT-95962-INTRACRANIAL-ELECTROCORTICOGRAPHY-STIMULATION-MAPPING

    CPT 95962: Intraoperative Brain Surface/Subcortical Mapping for Seizure Localization

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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