CPT 61595 Transtemporal Approach Reimbursement | OpenPayer

Summary & Overview

CPT 61595: Transtemporal Approach to Posterior Cranial Fossa/Skull Base

CPT code 61595 denotes a transtemporal surgical approach to lesions of the posterior cranial fossa, jugular foramen, or midline skull base, often involving mastoidectomy and possible decompression of the sigmoid sinus or facial nerve. This code is used to report complex skull base approaches that facilitate access to deep-seated or anatomically constrained intracranial lesions and is relevant for neurosurgery and otolaryngology procedural billing. Nationally, accurate use of this code affects procedure attribution, hospital case mix, and reimbursement for high-complexity cranial base surgery.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for the approach, typical sites of service, and common billing considerations. The publication outlines payer coverage patterns and benchmarking themes where available, highlights documentation points that support appropriate code selection, and summarizes related coding topics for skull base surgery. This resource is intended to inform billing specialists, coding compliance officers, and clinical teams about the clinical intent and administrative relevance of CPT code 61595 in national practice settings.

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

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare61595CPTskull base surgerytranstemporal approachmastoidectomyneurosurgeryoperating roomposterior cranial fossa

Billing Code Overview

CPT code 61595 describes a transtemporal surgical approach to the posterior cranial fossa, jugular foramen, or midline skull base. The procedure may include a mastoidectomy and/or decompression of the sigmoid sinus and/or facial nerve. The specific approach chosen depends on the location and size of the lesion.

Service type: Skull base / neurosurgical operative approach

Typical site of service: Hospital operating room or tertiary surgical center (inpatient or outpatient surgical facility depending on patient and procedure complexity)

Clinical & Coding Specifications

Clinical Context

A typical patient is a 45–65-year-old adult presenting with progressive unilateral hearing loss, pulsatile tinnitus, and cranial nerve deficits (eg, lower cranial nerve palsy or facial weakness) due to a lesion centered in the posterior cranial fossa, jugular foramen, or midline skull base such as a jugular foramen schwannoma, glomus jugulare tumor, or petroclival meningioma. Diagnostic workup includes high-resolution MRI with and without contrast, CT temporal bone for bone anatomy, audiometry, and preoperative angiography when vascularity is suspected. Multidisciplinary planning involves neurosurgery, otology/neurotology, neuroradiology, and anesthesia. The operative workflow typically uses a transtemporal (extended posterior fossa or transmastoid) approach with possible mastoidectomy, decompression of the sigmoid sinus and/or facial nerve, and microsurgical tumor resection. Intraoperative neurophysiologic monitoring (facial nerve EMG, brainstem auditory evoked responses) and neuronavigation are commonly used. Postoperative care includes ICU or step-down monitoring for cranial nerve function, wound care, imaging to assess extent of resection, and rehabilitation for residual cranial neuropathies. Typical site of service is an inpatient tertiary hospital or academic medical center with neurosurgical and otologic surgical capabilities. Service type: major operative procedure — skull base neurosurgery with otologic components.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services

CPT 61598: Transpetrosal Approach to Posterior Cranial Fossa or Skull Base

CPT-61597-FAR-LATERAL-TRANSCONDYLAR-SKULL-BASE-APPROACH

CPT 61597: Far Lateral Transcondylar Skull-Base Approach

CPT-61596-TRANSCOCHLEAR-APPROACH-SKULL-BASE-LESION

CPT 61596: Transcochlear Approach to Skull Base Lesions

Taxonomy Code	Specialty	Notes
2084P0800X	Neurosurgery	Primary specialty performing posterior cranial fossa and skull base tumor resections.
2084N0400X	Otolaryngology (Neurotology)	Performs transtemporal approaches, mastoidectomy, facial nerve decompression.
163W00000X	Anesthesiology	Provides general and specialized neuroanesthesia for complex skull base cases.
1744P0800X	Surgical Oncology (Neurosurgical Oncology)	Involved for malignant skull base lesions and complex resections.
207RH0000X	Radiology – Diagnostic Neuroradiology	Provides preoperative imaging interpretation and intraoperative image guidance support.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C71.7`	Malignant neoplasm of brain, ventricle and cerebellum	Posterior fossa neoplasms that may require transtemporal access for resection.
`D33.3`	Benign neoplasm of brain, cerebellum and other parts of central nervous system	Benign posterior fossa tumors (eg, meningioma, schwannoma) commonly approached via transtemporal routes.
`C75.3`	Malignant neoplasm of pituitary gland and craniopharyngeal duct	Midline skull base lesions that may require extended skull base approaches; included when approach traverses temporal bone.
`D32.9`	Benign neoplasm of meninges, unspecified	Meningiomas at the skull base or posterior fossa that are indications for `61595`.
`C71.6`	Malignant neoplasm of cerebellum	Cerebellar malignancies accessed through posterior fossa/transtemporal approaches.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`69990`	Microsurgical techniques, requiring use of an operating microscope (List separately in addition to primary procedure)	Often reported in addition to `61595` when operative microscope is used for tumor dissection.
`61445`	Craniectomy or craniotomy for tumor, posterior fossa; infratentorial	May be an alternative or adjunct cranial approach for posterior fossa lesions depending on tumor extent.
`69990`	(See above)	(Duplicate entries should be avoided; microscope use is commonly reported when appropriate.)
`95940`	Spinal neurophysiology; monitoring during surgery with interpretation and report	Intraoperative neurophysiologic monitoring codes (eg, facial nerve EMG, BAER) are billed separately when monitoring is performed with professional interpretation.
`61618`	Stereotactic functional procedures, cranial	May be used in preoperative lesion localization or adjunct stereotactic procedures for skull base lesions.
`61624`	Excision or destruction of lesion of skull base or cranial nerve foramen	Related skull base lesion procedures; used when a focused excision near foramina is performed.

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