CPT 61537 Temporal Lobectomy Reimbursement

CPT code 61537 identifies an open neurosurgical temporal lobectomy performed through an elevated portion of the skull to remove the temporal lobe when diagnostic testing localizes seizure onset to that region. This procedure is a key treatment option for medically refractory temporal lobe epilepsy and has significant implications for clinical outcomes, surgical capacity, and payer coverage policies nationwide. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context explaining the procedure and its typical hospital-based setting, an overview of payer coverage considerations and common modifier use, and benchmarking and policy-related topics relevant to reimbursement and utilization management. The publication also outlines typical billing and service-line considerations for hospitals and neurosurgical practices, highlights where data is not available in the input, and directs readers to related coding resources for further detail. This summary is written for a national audience and does not reference state-specific rules.

Billing Code Overview

CPT code 61537 describes a neurosurgical procedure in which the provider removes the temporal lobe of the brain through an elevated portion of the skull. This service is performed for patients whose diagnostic testing indicates epileptic seizures originate in the temporal lobe and does not include the use of electrocorticography.

Service type: Neurosurgical resection of the temporal lobe (an open cranial neurosurgical procedure)
Typical site of service: Inpatient or outpatient hospital operating room (major hospital surgical setting)

Data not available in the input for payers, associated taxonomies, ICD-10 diagnoses, related codes, and service line.

Clinical Context

A typical patient is a 28-year-old with medically refractory focal epilepsy characterized by complex partial seizures originating from the mesial temporal lobe despite trials of two or more appropriate antiepileptic medications. Preoperative evaluation includes prolonged video-EEG monitoring, high-resolution MRI demonstrating mesial temporal sclerosis or a focal lesion, neuropsychological testing, and sometimes PET or SPECT localization. After multidisciplinary review, the neurosurgeon schedules an anterior temporal lobectomy under general anesthesia. The procedure is performed in an inpatient operating room with standard neurosurgical staffing: neurosurgeon, anesthesiologist, circulating nurse, scrub tech, and intraoperative support such as neuronavigation. Typical perioperative workflow: preoperative consent and baseline neurologic exam, surgical site preparation and neuronavigation setup, craniotomy and resection of the affected temporal lobe portion, hemostasis and dural closure, skull bone replacement and skin closure, postoperative ICU or step-down monitoring for neurologic status, pain and seizure management, and postoperative imaging to document extent of resection. Expected stay is 1–4 days depending on complexity and complications.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	When work required is substantially greater than usual for `61537` (extensive dissection, prolonged operative time beyond typical expectations).

Taxonomy Code	Specialty	Notes
`207YL0000X`	Neurological Surgery	Primary specialty performing `61537`.
`2084N0400X`	Neurology	Involved in preoperative evaluation and postoperative seizure management.
`207RH0000X`	Pediatric Neurological Surgery	For pediatric patients requiring temporal lobectomy.
`207K00000X`	Critical Care Medicine	Manages perioperative ICU-level care when complications arise.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G40.211`	Localization-related (focal) (partial) epilepsy with complex partial seizures, intractable with status epilepticus	Common indication when seizures are focal to the temporal lobe and medically refractory; candidate for `61537`.
`G40.219`	Localization-related (focal) (partial) epilepsy, intractable, without status epilepticus	Indicates drug-resistant focal epilepsy suitable for surgical consideration.
`G40.901`	Epilepsy, unspecified, intractable	Used when epilepsy is refractory and temporal lobe localization is identified.
`G93.41`	Mesial temporal sclerosis	Imaging or pathologic finding often leading to temporal lobectomy.
`R56.9`	Unspecified convulsions	May be used in acute presentations needing further localization and workup prior to surgery.
`G40.209`	Localization-related (focal) (partial) epilepsy without intractable features	May appear in evaluation but less commonly an indication for definitive resection unless medically refractory.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61537`	Resection of temporal lobe by craniotomy (anterior temporal lobectomy) without electrocorticography	Primary procedure described.
`62167`	Stereotactic craniotomy for excision of lesion; supratentorial	May be used when lesion-directed stereotactic techniques are employed in conjunction with temporal resection.
`61618`	Stereotactic radiosurgery, single or multiple isocenters, without image-guidance device (gamma knife)	Sometimes used as alternative or adjunct for focal epileptogenic lesions when surgery is contraindicated.
`95940`	Continuous intraoperative neurophysiological monitoring; simple cases	Represents intraoperative monitoring services that may be performed during `61537` for functional mapping (professional component billed separately).
`70553`	MRI brain with and without contrast, with epilepsy protocol sequences	Preoperative imaging commonly obtained to localize mesial temporal pathology prior to `61537`.

OpenPayer

Summary & Overview

CPT 61537: Temporal Lobe Resection for Epilepsy