CPT 61606 Reimbursement Benchmarks & Policy | OpenPayer

Summary & Overview

CPT 61606: Excision of Intradural Lesion at Middle Cranial Fossa Base

CPT code 61606 denotes an advanced neurosurgical procedure: removal of an intradural neoplastic, vascular, or infectious lesion at the base of the middle cranial fossa, including lesions situated in the infratemporal fossa, parapharyngeal space, or petrous apex, with optional dural repair. Nationally, this code represents high-complexity cranial surgery typically performed in hospital operating rooms or tertiary neurosurgical centers and has implications for specialty reimbursement, surgical resource utilization, and care coordination for complex cranial pathology. Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will gain a concise overview of the clinical context and service setting for CPT code 61606, plus what follows in the full publication: benchmark payment ranges and utilization patterns where available, relevant policy or billing updates that affect neurosurgical indexing and claims adjudication, and clinical considerations tied to operative complexity and site of service. Data not available in the input will be identified explicitly in the detailed sections of the full publication.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 61606neurosurgerycranial surgerymiddle cranial fossaintradural lesiondural repairoperative procedurehospital services

Billing Code Overview

CPT code 61606 describes surgical removal of a neoplastic, vascular, or infectious lesion located at the base of the middle cranial fossa that is intradural (within or beneath the outer covering of the brain). The description specifies lesions in anatomically complex locations including the infratemporal fossa, parapharyngeal space, or petrous apex. The service may include repair of the dura mater, which can involve placement of a dural graft if needed.

Service type: Neurosurgical intracranial lesion excision (intradural) at middle cranial fossa base
Typical site of service: Hospital operating room or tertiary care surgical center with neurosurgical capability

Clinical & Coding Specifications

Clinical Context

A 56-year-old patient presents with progressive cranial neuropathies, facial pain, and intermittent cerebrospinal fluid rhinorrhea. Imaging (MRI/CT) demonstrates a contrast-enhancing lesion involving the petrous apex with dural involvement and mass effect on adjacent cranial nerves. Neurosurgery evaluates the patient for resection of an intradural lesion located at the base of the middle cranial fossa within the petrous apex/parapharyngeal region. The clinical workflow includes preoperative neuroimaging review, multidisciplinary planning with otolaryngology or skull base teams as needed, informed consent that addresses potential cranial nerve deficits and CSF leak, preoperative anesthesia evaluation, intraoperative neuronavigation and microsurgical dissection with possible dural repair or dural graft placement, intraoperative neurophysiologic monitoring, and postoperative monitoring in a neurosurgical ICU with serial neurologic exams and follow-up imaging to assess extent of resection and surgical complications.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work or complexity substantially exceeds typical requirements for the procedure due to tumor complexity or extensive dissection.
`23`

CPT 61605: Extradural Middle Cranial Fossa Neoplasm Resection

CPT-61613-MIDDLE-CRANIAL-FOSSA-EXCISION-CAVERNOUS-SINUS-VASCULAR-LESION

CPT 61613: Middle Cranial Fossa Excision of Cavernous Sinus Vascular Lesion

CPT-61608-SKULL-BASE-INTRADURAL-NEOPLASM-RESECTION

CPT 61608: Intradural Resection of Skull Base Neoplasm

CPT-61607-EXTRADURAL-SKULL-BASE-NEOPLASM-RESECTION

CPT 61607: Extradural Skull Base Neoplasm Resection

CPT-61611-CAROTID-ARTERY-TRANSECTION-PETROUS-CANAL-DURING-LESION-REMOVAL

CPT 61611: Transection/Ligation of Carotid Artery in Petrous Canal

Taxonomy Code	Specialty	Notes
2084P0800X	Neurological Surgery	Primary specialty performing cranial base intradural tumor resections.
207L00000X	Otolaryngology – Head & Neck	Often involved for transpetrosal or skull base approaches and parapharyngeal involvement.
2086S0102X	Neurocritical Care	Postoperative critical care management of complex neurosurgical patients.
208VP0005X	Neurology	Preoperative and postoperative neurologic evaluation and follow-up.
363LF0000X	Anesthesiology	Intraoperative anesthesia management, including complex skull base cases.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C71.4`	Malignant neoplasm of temporal lobe	Temporal lobe tumors can extend to the middle cranial fossa and petrous apex requiring intradural resection.
`C70.0`	Malignant neoplasm of cerebral meninges	Meningeal tumors with dural involvement near the middle cranial fossa may require dural repair and intradural resection.
`D33.4`	Benign neoplasm of cerebral meninges	Meningiomas at the skull base often occur in the middle cranial fossa and petrous apex region and are common indications.
`G06.0`	Intracranial abscess and granuloma	Infectious lesions within or beneath the dura in the middle cranial fossa may require surgical drainage and removal.
`I67.6`	Nonpyogenic thrombosis of intracranial venous system	Vascular lesions or sequelae involving the skull base that complicate resection planning.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61582`	Craniectomy for tumor, supratentorial or infratentorial; suboccipital or posterior fossa approach	May be performed for posterior fossa lesions or when combined approaches are required with middle cranial fossa work.
`61605`	Excision or destruction of lesion, middle cranial fossa (extradural)	Related when lesion is extradural; distinguishes intradural vs extradural approach and may be billed if both components are addressed.
`62161`	Fenestration of meningocele; cranial	Used when CSF diversion or fenestration is needed as part of management of dural defects encountered during resection.
`61512`	Craniectomy or craniotomy, anterior cranial fossa	Relevant when a combined cranial base approach requires anterior cranial fossa exposure in the same session.
`69990`	Microsurgical techniques, requiring use of an operating microscope (list separately in addition to code for primary procedure)	Billed in addition when operative microscope is used during precise intradural dissection.
`61790`	Stereotactic computer-assisted procedure; cranial stereotactic navigation	Billed when intraoperative stereotactic navigation/registration is used to localize the lesion and guide resection.

OpenPayer