61520 CPT Reimbursement & Policy Benchmarks | OpenPayer

Summary & Overview

CPT 61520: Excision of Cerebellopontine Angle Tumor (Acoustic Neuroma)

CPT code 61520 denotes an open neurosurgical procedure to remove a cerebellopontine angle tumor, commonly known as an acoustic neuroma, via partial removal of skull bone. This code is clinically significant because it represents complex cranial surgery with substantial resource use, potential complications, and implications for hospital billing and specialty reimbursement nationally. Major public and private payers routinely review utilization and medical necessity for such high-acuity procedures.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context and typical care setting for 61520, plus what to expect in payer coverage considerations. The publication outlines benchmarks relevant to utilization and reimbursement patterns, summarizes recent policy or coding guidance that affects authorization and claims processing when available, and situates the procedure within surgical service-line operations.

The report is intended for hospital administrators, neurosurgical clinicians, and revenue cycle professionals seeking a national perspective on coding, clinical indications, and payer coverage dynamics related to complex posterior fossa tumor resection. Data not available in the input is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare61520CPTneurosurgeryacoustic neuromacraniotomyposterior fossaoperative-proceduresurgical-resection

Billing Code Overview

CPT code 61520 describes a neurosurgical procedure for excision of a cerebellopontine angle tumor (acoustic neuroma) through removal of a portion of the skull (craniectomy or craniotomy). The tumor is located below the tentorium cerebelli in the posterior fossa near the brainstem.

Service type: Open neurosurgical tumor excision

Typical site of service: Hospital inpatient or outpatient surgical center (operating room), commonly performed in a tertiary care or academic neurosurgery setting

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A 52-year-old patient presents with progressive unilateral hearing loss, tinnitus, and intermittent imbalance. MRI of the brain with contrast demonstrates a 2.5–3.5 cm enhancing mass in the cerebellopontine angle consistent with a vestibular schwannoma (acoustic neuroma) located below the tentorium cerebelli in the posterior fossa. The neurosurgical team schedules a posterior fossa craniotomy with excision of the cerebellopontine angle tumor. Preoperative workflow includes neurosurgical evaluation, audiology testing, brain MRI, anesthesia assessment, and informed consent documenting surgical risks including cranial nerve deficits, CSF leak, and need for intraoperative monitoring. The procedure is typically performed in an inpatient operating room under general anesthesia with intraoperative neurophysiologic monitoring (brainstem auditory evoked potentials and facial nerve monitoring). Postoperative care involves ICU or monitored step-down observation for hemodynamic and neurologic status, pain control, wound care, early mobilization, and follow-up MRI at an interval to assess extent of resection.

Coding Specifications

Modifier	Description	When to Use
`62`	Two surgeons	Use when two surgeons of different specialties (e.g., neurosurgeon and skull base otolaryngologist) perform distinct portions of the craniotomy/resection.

CPT 61450: Section/Decompression of Gasserian Ganglion for Trigeminal Neuralgia

CPT-61345-POSTERIOR-FOSSA-DECOMPRESSION-SUBOCCIPITAL-CRANIECTOMY

CPT 61345: Posterior Fossa Decompression (Suboccipital Craniectomy)

CPT-61534-CRANIOTOMY-RESECTION-EPILEPTOGENIC-FOCUS

CPT 61534: Craniotomy for Resection of Epileptogenic Focus

CPT-61330-ORBITAL-DECOMPRESSION-FOR-PROPTOSIS-OR-FRACTURE

CPT 61330: Orbital Decompression for Proptosis or Orbital Roof Fracture

CPT-61538-TEMPORAL-LOBECTOMY-WITH-INTRAOPERATIVE-ECOG

CPT 61538: Temporal Lobectomy with Intraoperative Electrocorticography

CPT-61521-SKULL-BASE-POSTERIOR-FOSSA-TUMOR-RESECTION

CPT 61521: Skull Base or Posterior Fossa Tumor Resection

CPT-61304-ANTERIOR-SKULL-CRANIOTOMY-BRAIN-INSPECTION

CPT 61304: Supratentorial Brain Inspection via Anterior Cranial Access

CPT-61548-PITUITARY-TUMOR-RESECTION-TRANSNASAL-TRANSORAL

CPT 61548: Resection of Pituitary Gland or Tumor via Nose or Mouth

CPT-61570-CRANIECTOMY-CRANIOTOMY-FOREIGN-BODY-EXCISION

CPT 61570: Craniectomy/Craniotomy, Excision of Foreign Body

CPT-61567-SUBPIAL-CORTICAL-SECTIONING-WITH-CORTICAL-RECORDING

CPT 61567: Subpial Cortical Sectioning with Intraoperative Cortical Recording

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Taxonomy Code	Specialty	Notes
207P00000X	Neurological Surgery	Primary specialty performing posterior fossa/craniotomy tumor resections.
2084P0200X	Neurotology / Otology	Skull base otolaryngologists may co-manage cerebellopontine angle tumors, particularly for hearing preservation approaches.
207L00000X	Clinical Neurophysiology	Providers performing or supervising intraoperative neuromonitoring services.
208000000X	Otolaryngology	May be involved in combined approaches or postoperative otologic care.
261QM0800X	Anesthesiology	Provides general anesthesia and perioperative care for intracranial procedures.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`D33.3`	Benign neoplasm of cranial nerves	Common code for vestibular schwannoma (acoustic neuroma) affecting cranial nerve VIII in the cerebellopontine angle.
`C71.7`	Malignant neoplasm of cerebellum	Used when a posterior fossa tumor is malignant and located in the cerebellum; relevant for differential diagnoses and oncologic management.
`C71.6`	Malignant neoplasm of brain, specified as brain stem	Applicable when lesions involve adjacent posterior fossa structures near the brainstem.
`G51.0`	Bell's palsy	Included as a related diagnosis when facial nerve dysfunction is present pre- or postoperatively requiring evaluation.
`H90.3`	Sensorineural hearing loss, bilateral	Relevant when significant sensorineural hearing loss is present and auditory function is assessed in the setting of CPA tumors.
`R42`	Dizziness and giddiness	Symptom code commonly present in patients with posterior fossa masses and used in preoperative documentation.
`G93.1`	Anoxic brain damage, not elsewhere classified	Included for coding when neurologic sequelae are present; used cautiously and only when clinically documented.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61520`	Craniectomy or craniotomy for intracranial tumor; cerebellopontine angle (e.g., acoustic neuroma), below tentorium	The primary procedure code describing posterior fossa craniotomy and excision of a cerebellopontine angle tumor.
`95851`	Electroencephalogram (monitoring) during surgical procedures with interpretation and report	Used when intraoperative EEG or neurophysiologic monitoring is billed separately for neuromonitoring support.
`92620`	Evaluation of central auditory function; evoked auditory potentials	Billed for intraoperative or perioperative auditory evoked potential testing related to hearing preservation.
`61790`	Stereotactic computer-assisted procedure; cranial, localization for lesion	May be performed preoperatively for planning or intraoperatively for navigation assistance.
`61254`	Craniectomy or craniotomy, posterior fossa, with microvascular decompression or approach	Related posterior fossa approach codes for procedures that may be performed in combination or in differential coding scenarios.
`99152`	Anesthesia for procedures on the head and neck — initial 90 minutes	Represents anesthesia services typically reported by anesthesiology for prolonged intracranial surgery (actual anesthesia coding varies by payer and ASA guidelines).

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