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    v1.0.30
    OpenPayerBilling CodesSub-Scalp Bilateral Electroencephalography Analysis and Monitoring ProceduresCPT cpt-1009t-subscalp-continuous-bilateral-eeg-remote-interpretation-30-day
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    CPT 1009T: Remote Subscalp Continuous Bilateral EEG Monitoring, 30 Days

    CPT code 1009T describes a remote monitoring service in which the provider acquires EEG data from an implanted subscalp continuous bilateral EEG system, identifies spikes and seizure activity, interprets the recordings, and prepares a report covering up to 30 days of data; service type: remote continuous EEG monitoring with interpretation and reporting; typical site of service: outpatient or ambulatory remote monitoring of an implanted subscalp device.

    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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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 28-year-old patient with drug-resistant focal epilepsy undergoes implantation of a subscalp continuous bilateral EEG monitoring device to capture infrequent seizures and interictal epileptiform activity. The implant is placed in the outpatient surgical suite by a neurosurgeon with perioperative support from an epileptologist. After implantation and an initial postoperative check, the device records continuous EEG data for up to 30 days while the patient goes about normal activities. A remote monitoring clinician (epileptologist or neurophysiologist) accesses the transmitted EEG data, uses automated spike and seizure detection algorithms to flag suspicious events, reviews and verifies detected events, interprets the findings in the context of clinical history and seizure diaries, and prepares a formal interpretation report summarizing spikes, electrographic seizures, timing, lateralization, and recommended next steps for the treating team. The remote acquisition, identification, interpretation and reporting workflow corresponds to 1009T and typically occurs in an ambulatory or outpatient remote monitoring setting with secure telemetry and electronic health record documentation. Common payors include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare. Follow-up includes clinical review with the treating neurologist/neurosurgeon to correlate events with symptoms and adjust medical or surgical management as indicated by the team’s clinical decision-making.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    95970Electronic analysis of implanted neurostimulator pulse generator system with reprogramming, simple or complex; initial interrogation and programmingMay be performed if the implanted device requires interrogation, programming, or adjustments during follow-up visits related to subscalp monitoring systems.
    95971Electronic analysis of implanted neurostimulator pulse generator system with reprogramming, simple or complex; subsequent interrogation and programmingUsed for subsequent device interrogations or programming visits after initial setup.
    95812EEG; awake and drowsy (recording, scalp, routine)Routine scalp EEG performed in-clinic that may be used before or after implant to compare findings and localize epileptiform activity.
    95816EEG; prolonged video-EEG monitoring with recording, unattended, up to 72 hours or moreIn-hospital or outpatient prolonged video-EEG monitoring that can be an alternative or supplement to subscalp continuous monitoring for capturing events.
    92587Balance testing (electronystagmography), unless otherwise specifiedData not directly related but occasionally billed by neurophysiology labs during comprehensive vestibular or neurophysiologic evaluations; include only when clinically indicated.

    Related Modifiers

    5 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…
    25CPT modifier 25 indicates that on the same day as another procedure or service, the same physician or other qualified health care professional provided a significant, separately identifiable…- When to apply: Use modifier 25 only on an E/M code to indicate the same provider delivered a significant, separately identifiable E/M service on the same day as another procedure or service — i.e.,…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207RG0100X
    2084N0400X
    208U00000X
    363A00000X
    261QF0400X
    341800000X
    3418M1120X
    2080S0010X

    Related ICD-10-CM Codes

    23 rows

    ICD-10-CM CodeDescription
    F07.0Personality change due to known physiological condition
    F44.4Conversion disorder with motor symptom or deficit
    F44.5Conversion disorder with seizures or convulsions
    G25.3Myoclonus
    G40.101Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticus
    G40.209Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus
    G40.311Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus
    G40.411Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus
    G40.901Epilepsy, unspecified, not intractable, with status epilepticus
    G40.909Epilepsy, unspecified, not intractable, without status epilepticus

    Showing 1–10 of 23

    Related Payer Policy Updates

    Specialty: Neurology/Neurosurgery1 / 3

    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-1004T-IMPLANTED-SUBSCALP-CONTINUOUS-BILATERAL-EEG-TECHNICAL-REVIEW

    CPT 1004T: Implanted Subscalp Continuous Bilateral EEG Data Review

    CPT-1005T-SUBSCALP-CONTINUOUS-BILATERAL-EEG-DEVICE-PROGRAMMING

    CPT 1005T: Subscalp Continuous Bilateral EEG System Programming

    CPT-1006T-SUBSCALP-IMPLANT-EEEG-DEVICE-PROGRAMMING

    CPT 1006T: Implantable Subscalp Continuous EEG Settings Adjustment

    CPT-1007T-SUBSCALP-CONTINUOUS-BILATERAL-EEG-30-DAY-INTERPRETATION

    CPT 1007T: Implanted Subscalp Continuous Bilateral EEG Review

    CPT-1008T-EXTERNAL-COMMUNICATOR-SETUP-SUBSCALP-CONTINUOUS-BILATERAL-EEG

    CPT 1008T: External Device Setup and Patient Education for Subscalp EEG

    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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