Summary & Overview
CPT 95961: Intracranial Seizure Localization and Brain Mapping
CPT code 95961 represents intracranial cortical and subcortical brain mapping performed by placing electrodes on or into the brain and electrically stimulating tissue to provoke seizures and localize seizure onset zones during or before neurosurgical procedures. This procedure is critical for planning resections in patients with epilepsy and for minimizing risk to eloquent cortex. Nationally, intracranial monitoring and mapping play a central role in specialized epilepsy centers and complex neurosurgical care.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and service characteristics, coverage and coding considerations relevant to major payers, common billing modifiers, and typical sites of service. The publication highlights benchmarks for utilization and reimbursement patterns where available and summarizes policy updates affecting authorization and documentation requirements.
The content provides clinicians, coding professionals, and policy staff with the procedural definition, expected clinical indications, and payer-focused considerations needed to support accurate coding and claims submission for CPT code 95961. Data not available in the input will be noted explicitly in relevant sections.
Billing Code Overview
CPT code 95961 describes intraoperative or extraoperative cortical and subcortical brain mapping using electrodes placed on the brain surface or directly into the brain to electrically stimulate tissue and provoke seizures for localization of seizure onset prior to or during neurosurgery. This procedure is a form of functional brain mapping used to identify epileptogenic zones and preserve critical cortical areas when planning resection.
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Service type: Intracranial seizure localization and cortical/subcortical functional brain mapping
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Typical site of service: Inpatient or ambulatory neurosurgery setting, operating room or epilepsy monitoring unit
Clinical & Coding Specifications
Clinical Context
A typical patient is a 25–45-year-old adult with medically refractory focal epilepsy being evaluated for potential epilepsy surgery. The patient has recurrent focal-onset seizures despite trials of multiple antiepileptic drugs and noninvasive localization studies (video EEG, MRI, PET, and MEG) that suggest a surgically remediable epileptogenic zone but remain insufficiently localized. The clinical workflow begins with a multidisciplinary epilepsy conference decision to pursue invasive monitoring and cortical stimulation mapping. The patient is admitted to an inpatient neurosurgical unit or epilepsy monitoring unit. Under general anesthesia, a neurosurgeon performs a craniotomy and places subdural grid/strip electrodes or stereotactic depth electrodes targeting the suspected epileptogenic cortex. After recovery from anesthesia, the epilepsy team performs electrocorticographic recording over days to capture spontaneous seizures. Electrical cortical stimulation is performed using the implanted electrodes to map eloquent cortex and to provoke habitual seizures for precise localization of the seizure onset zone. Results guide a subsequent resection or ablation procedure. Typical site of service is an inpatient operating room for electrode implantation with subsequent inpatient epilepsy monitoring unit for stimulation and recording; the stimulation mapping itself commonly occurs at the bedside in the inpatient monitoring unit or in an intraoperative setting if performed during awake craniotomy.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component |