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    OpenPayerBilling CodesSleep Medicine Testing and Long-term EEG ProceduresCPT cpt-95721-long-term-continuous-eeg-spike-seizure-analysis
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    CPT 95721: Continuous EEG Spike and Seizure Analysis, 36–60 Hours

    Medicare pays $224 on average nationally for this procedure.

    CPT code 95721 describes physician or qualified healthcare professional review and analysis of recorded events for spike and seizure detection from a continuous electroencephalography (EEG) study lasting greater than 36 hours and up to 60 hours with no video; this service involves interpretation of the prolonged EEG recording and preparation of a clinical report, typically provided as an inpatient or inpatient-observation neurodiagnostic monitoring service or as an extended outpatient EEG monitoring session depending on site of care.

    For related coverage guidance, see recent payer policy updates: Navigated Transcranial Magnetic Stimulation for Preoperative Brain Mapping, Navigated Transcranial Magnetic Stimulation for Preoperative Brain Mapping, Navigated Transcranial Magnetic Stimulation for Preoperative Brain Mapping.

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    Clinical & Coding Specifications

    Clinical Context

    A 28-year-old patient with a history of cryptogenic recurrent events is admitted for continuous electroencephalographic monitoring to characterize frequent spells concerning for seizures. The clinical team places EEG electrodes and records continuous scalp EEG for an extended period when outpatient ambulatory monitoring is insufficient due to event frequency and need for prolonged capture. The study records electrical activity continuously for greater than 36 hours and up to 60 hours without synchronized video. A neurologist or other qualified healthcare professional (QHCP) later reviews the recorded events, performs spike and seizure detection analysis across the full prolonged recording, interprets findings (including interictal epileptiform activity, electrographic seizures, and background abnormalities), and prepares a formal written report for the referring physician. Typical workflow steps include: electrode application and technical setup, continuous EEG acquisition by technologists, periodic technical quality checks, unattended or remote event marking as needed, offline physician review of the full EEG file, event annotation and quantification of spike burden and seizure frequency, generation of an interpretation and clinical impression, and communication of results to the care team. Typical sites of service are inpatient neurology wards, epilepsy monitoring units without video capability, observation units, and outpatient ambulatory EEG centers capable of long-duration monitoring.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    95816Electroencephalogram (EEG) with recording of awake and drowsy states; 21–30 minutesShort routine EEG often performed prior to prolonged monitoring to obtain baseline activity
    95951Continuous EEG monitoring, with interpretation and report, for initial 24 hours; physician review and interpretationShorter duration continuous EEG interpretation; 95721 extends beyond 36 hours up to 60 hours and is used when monitoring exceeds 36 hours
    95952Continuous EEG monitoring, each additional 12 hours (List separately in addition to code for primary service)Used to report additional interpretation units for extended continuous monitoring in workflows that segment billing by time
    95900Electroencephalogram (routine) for epilepsy, sleep-deprived or prolonged outpatientRelated routine EEG modalities that may precede or complement long-term monitoring
    95822EEG with recording during sleep, prolongedProlonged EEG with sleep may be an alternative technique when video is available; contrasts with 95721 which specifies no video

    Related Modifiers

    7 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…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…
    77Modifier 77 indicates that a previously performed procedure or service was legitimately repeated by a different physician or other qualified health care professional. The AMA’s CPT definition…- Use modifier 77 when a basic procedure or service already performed is repeated by a different physician or other qualified health care professional (for example, a second provider independently…
    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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    2084P0800X
    207RI0001X
    207Q00000X
    2084N0400X
    163WR1000X
    163WF0300X
    261QS0132X
    163WP1700X

    Related Payer Policy Updates

    Specialty: Neurology/Neurosurgery1 / 2

    10 rows

    PolicyPayerEffective Date
    Navigated Transcranial Magnetic Stimulation for Preoperative Brain Mappingpremerabluecrossofwashington2027-02-05
    Navigated Transcranial Magnetic Stimulation for Preoperative Brain Mappingpremerabluecrossofwashington2027-02-05
    Navigated Transcranial Magnetic Stimulation for Preoperative Brain Mappingpremerabluecrossofwashington2027-02-05
    Calcitonin Gene-Related Peptide (CGRP) Inhibitors: Vyepti (eptinezumab-jjmr)Mass General Brigham Health Plan2027-01-04
    Clinical Review Criteria Intraoperative Neurophysiological Monitoring (IONM)Kaiser Permanente2027-01-01
    Open Neuroplasty Lumbar PlexusCigna2026-12-15
    Laser Interstitial Thermal TherapyCigna2026-11-15
    Remote Electrical Neuromodulation for Migraines (i.e., Nerivio®)bcbsvermont2026-11-01
    Artificial Cervical Intervertebral Discuniverahealthcare2026-10-15
    Lumbar Microdiscectomyuniverahealthcare2026-10-15

    Related Codes

    CPT-95705-UNMONITORED-EEG-2-TO-12-HOURS

    CPT 95705: Unmonitored Electroencephalography, 2–12 Hours

    CPT-95706-EXTENDED-EEG-MONITORING-2-TO-12-HOURS

    CPT 95706: EEG, 2–12 Hours, Intermittent Monitoring

    CPT-95707-EXTENDED-EEG-MONITORING-2-TO-12-HOURS

    CPT 95707: Ambulatory EEG, Continuous Monitoring 2–12 Hours

    CPT-95708-UNMONITORED-AMBULATORY-EEG-12-26-HOURS

    CPT 95708: Unmonitored EEG, 12–26 Hours

    CPT-95709-PROLONGED-AMBULATORY-EEG-12-TO-26-HOURS

    CPT 95709: Ambulatory EEG, 12–26 Hours, No Video

    CPT-95710-CONTINUOUS-EEG-MONITORING-NO-VIDEO

    CPT 95710: Continuous EEG Monitoring, Technologist Technical Review

    CPT-95711-UNMONITORED-EEG-2-TO-12-HOUR-VIDEO-TECHNICAL-REVIEW

    CPT 95711: Unmonitored EEG with Video, 2–12 Hours

    CPT-95712-EXTENDED-VIDEO-EEG-2-12-HOUR-MONITORING

    CPT 95712: Intermittent Video EEG Monitoring, 2–12 Hours

    CPT-95713-PROLONGED-EEG-WITH-VIDEO-2-TO-12-HOURS

    CPT 95713: Video Electroencephalography, 2–12 Hour Continuous Monitoring

    CPT-95714-UNMONITORED-EEG-12-TO-26-HOURS-WITH-VIDEO

    CPT 95714: Unmonitored EEG With Video, 12–26 Hours

    Showing 1–10 of 29

    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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