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CPT 95962: Intracranial Electrocorticography with Stimulation Mapping

CPT code 95962 denotes an add-on, hourly attendance for invasive electrocorticographic mapping with electrical stimulation to localize seizure onset and map functional cortex during presurgical or intraoperative evaluation. This procedure is clinically significant nationwide because it directly informs neurosurgical decision-making for patients with medically refractory epilepsy and other focal seizure disorders, helping to balance seizure control with preservation of critical brain functions.

Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The review covers payer coverage patterns, typical sites of service, clinical indications, and common billing considerations tied to add-on hourly mapping for invasive intracranial monitoring.

Readers will gain a concise understanding of what CPT code 95962 represents, how it fits into the care pathway for epilepsy surgery, and which clinical settings commonly perform the service. The publication highlights benchmarking and policy-relevant points such as payer inclusion, where available, and outlines the clinical context that influences utilization and billing. Data not available in the input is noted where applicable.

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Billing Code Overview

CPT code 95962 is an add–on procedure for invasive electrocorticography with electrical stimulation used to map cortical or subcortical brain regions by placing electrodes on or into the brain and electrically stimulating tissue to provoke or localize seizures during or before neurosurgical procedures. This service supports surgical planning by identifying the seizure onset zone and eloquent cortex to guide resection.

Service type: Invasive intracranial EEG mapping with electrical stimulation; add–on hourly attendance for cortical/subcortical mapping
Typical site of service: Hospital inpatient or outpatient surgical setting, operating room, or specialized epilepsy monitoring unit where invasive electrode placement and stimulated mapping are performed

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CPT 95962: Intracranial Electrocorticography with Stimulation Mapping

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Billing Code Overview

Service type: Invasive intracranial EEG mapping with electrical stimulation; add–on hourly attendance for cortical/subcortical mapping
Typical site of service: Hospital inpatient or outpatient surgical setting, operating room, or specialized epilepsy monitoring unit where invasive electrode placement and stimulated mapping are performed

Clinical & Coding Specifications

Clinical Context

A 28-year-old patient with medically refractory focal epilepsy is admitted for intracranial EEG monitoring to localize the seizure focus prior to resective epilepsy surgery. The neurosurgical and epilepsy teams place subdural grid and depth electrodes in the operating room under general anesthesia. Over several days the patient undergoes continuous monitoring; when spontaneous seizures are insufficient for localization or when functional mapping is required, the epileptologist performs electrical stimulation of cortical and/or subcortical electrodes in the monitored area to provoke seizures and to map seizure onset zones.

The add-on procedure 95962 is billed for each additional hour of direct physician attendance when prolonged cortical stimulation is performed to provoke and localize seizures during invasive monitoring or intraoperative mapping. Typical workflow includes electrode placement (operative CPT), postoperative EEG monitoring, planned cortical stimulation sessions for seizure provocation and mapping, documentation of stimulation parameters and clinical/EEG responses, and multidisciplinary case review to plan definitive resection. Typical site of service is an operating room for electrode placement or an inpatient epilepsy monitoring unit/neurosurgical step-down unit for stimulation sessions.

Coding Specifications

Modifier	Description	When to Use
`59`	Distinct procedural service	Use when `95962` is performed in addition to a non-overlapping procedure and documentation shows distinct, separate service.
`62`	Two surgeons	Use when two surgeons perform portions of the surgical mapping/implantation requiring separate surgical director roles.
`77`	Repeat procedure by another physician	Use when a second physician repeats the stimulation procedure during the same hospitalization at a later time.
`78`	Return to OR for related procedure during postoperative period	Use if intraoperative mapping leads to an immediate return to the OR for expanded resection.
`80`	Assistant surgeon	Use when a surgical assistant is documented participating in the operative electrode placement and mapping.
`26`	Professional component	Use when billing only the physician’s professional services separate from the technical component.
`TC`	Technical component	Use when billing only the facility/technical component of monitoring/stimulation equipment.
`52`	Reduced services	Use when the stimulation session is truncated or abbreviated and documentation supports reduced service.
`53`	Discontinued procedure	Use when stimulation is attempted but discontinued for patient safety before an hour is completed.
`22`	Unusual procedural services	Use when complexity or time significantly exceeds typical and documentation supports increased work.

Taxonomy Code	Specialty	Notes
2084P0800X	Neurological Surgery	Neurosurgeons perform electrode placement and intraoperative cortical mapping.
207P00000X	Neurology	Epileptologists/neurophysiologists direct cortical stimulation and interpret intracranial EEG.
225100000X	Clinical Neurophysiology	Specialists in intraoperative and intracranial EEG monitoring who perform stimulation and interpretation.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G40.111`	Focal (partial) onset seizures with impairment of consciousness, with intractable epilepsy	Common indication for intracranial mapping and seizure provocation to localize seizure focus for resection.
`G40.209`	Localization-related (focal) epilepsy, unspecified, not intractable	Focal epilepsy requiring further localization when noninvasive testing is inconclusive.
`G40.909`	Epilepsy, unspecified, not intractable	Diagnostic category when planning invasive monitoring to clarify seizure onset zones.
`G40.801`	Epilepsy, intractable, without status epilepticus	Intractable epilepsy prompting invasive evaluation including cortical stimulation.
`R56.9`	Unspecified convulsions	Used when seizure events prompt invasive diagnostic evaluation for localization.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61533`	Craniectomy or craniotomy for exploration, for lesionectomy or excision of lesion, or for implantation of neurostimulation electrodes (includes opening of dura)	Used for surgical placement of subdural grids or depth electrodes preceding prolonged cortical stimulation sessions billed with `95962`.
`95970`	Intraoperative neurophysiology monitoring (e.g., EEG, evoked potentials) with interpretation and report	Represents intraoperative monitoring services that may be performed concurrently with mapping and stimulation; documents technical and professional monitoring.
`95965`	Monitoring of implanted neurostimulator pulse generator for epilepsy — programming and/or testing	May be used for device management if an implantable neurostimulator is placed as definitive therapy after localization.
`95957`	Continuous EEG monitoring in the critical care setting for 60 minutes or more with interpretation and report	Reflects prolonged EEG recording and interpretation that complements invasive stimulation for seizure localization.
`95836`	Electroencephalogram; video, during inpatient monitoring for seizure localization	Used for video-EEG correlation sessions in the epilepsy monitoring unit that accompany intracranial stimulation and localization.

CPT 95954: EEG Activation with Provider Attendance

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

CPT 95955: Intraoperative EEG Monitoring During Nonintracranial Surgery

CPT-95957-COMPUTER-BASED-EEG-ANALYSIS

CPT 95957: Computer-Based Analysis of Electroencephalogram

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 Seizure Localization and Brain Mapping

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`59`	Distinct procedural service	Use when `95962` is performed in addition to a non-overlapping procedure and documentation shows distinct, separate service.
`62`	Two surgeons	Use when two surgeons perform portions of the surgical mapping/implantation requiring separate surgical director roles.
`77`	Repeat procedure by another physician	Use when a second physician repeats the stimulation procedure during the same hospitalization at a later time.
`78`	Return to OR for related procedure during postoperative period	Use if intraoperative mapping leads to an immediate return to the OR for expanded resection.
`80`	Assistant surgeon	Use when a surgical assistant is documented participating in the operative electrode placement and mapping.
`26`	Professional component	Use when billing only the physician’s professional services separate from the technical component.
`TC`	Technical component	Use when billing only the facility/technical component of monitoring/stimulation equipment.
`52`	Reduced services	Use when the stimulation session is truncated or abbreviated and documentation supports reduced service.
`53`	Discontinued procedure	Use when stimulation is attempted but discontinued for patient safety before an hour is completed.
`22`	Unusual procedural services	Use when complexity or time significantly exceeds typical and documentation supports increased work.

Taxonomy Code	Specialty	Notes
2084P0800X	Neurological Surgery	Neurosurgeons perform electrode placement and intraoperative cortical mapping.
207P00000X	Neurology	Epileptologists/neurophysiologists direct cortical stimulation and interpret intracranial EEG.
225100000X	Clinical Neurophysiology	Specialists in intraoperative and intracranial EEG monitoring who perform stimulation and interpretation.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G40.111`	Focal (partial) onset seizures with impairment of consciousness, with intractable epilepsy	Common indication for intracranial mapping and seizure provocation to localize seizure focus for resection.
`G40.209`	Localization-related (focal) epilepsy, unspecified, not intractable	Focal epilepsy requiring further localization when noninvasive testing is inconclusive.
`G40.909`	Epilepsy, unspecified, not intractable	Diagnostic category when planning invasive monitoring to clarify seizure onset zones.
`G40.801`	Epilepsy, intractable, without status epilepticus	Intractable epilepsy prompting invasive evaluation including cortical stimulation.
`R56.9`	Unspecified convulsions	Used when seizure events prompt invasive diagnostic evaluation for localization.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61533`	Craniectomy or craniotomy for exploration, for lesionectomy or excision of lesion, or for implantation of neurostimulation electrodes (includes opening of dura)	Used for surgical placement of subdural grids or depth electrodes preceding prolonged cortical stimulation sessions billed with `95962`.
`95970`	Intraoperative neurophysiology monitoring (e.g., EEG, evoked potentials) with interpretation and report	Represents intraoperative monitoring services that may be performed concurrently with mapping and stimulation; documents technical and professional monitoring.
`95965`	Monitoring of implanted neurostimulator pulse generator for epilepsy — programming and/or testing	May be used for device management if an implantable neurostimulator is placed as definitive therapy after localization.
`95957`	Continuous EEG monitoring in the critical care setting for 60 minutes or more with interpretation and report	Reflects prolonged EEG recording and interpretation that complements invasive stimulation for seizure localization.
`95836`	Electroencephalogram; video, during inpatient monitoring for seizure localization	Used for video-EEG correlation sessions in the epilepsy monitoring unit that accompany intracranial stimulation and localization.

CPT 95954: EEG Activation with Provider Attendance

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

CPT 95955: Intraoperative EEG Monitoring During Nonintracranial Surgery

CPT-95957-COMPUTER-BASED-EEG-ANALYSIS

CPT 95957: Computer-Based Analysis of Electroencephalogram

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 Seizure Localization and Brain Mapping

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

OpenPayer

CPT 95962: Intracranial Electrocorticography with Stimulation Mapping

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Billing Code Overview

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CPT 95962: Intracranial Electrocorticography with Stimulation Mapping

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References