Summary & Overview

CPT 61710: Craniotomy with Embolization for Intracranial Vascular Lesions

CPT code 61710 represents a complex neurosurgical procedure: a craniotomy to access an intracranial vascular lesion (aneurysm, vascular malformation, or carotid–cavernous fistula) with embolization to occlude the lesion’s blood supply. Nationally, this code denotes high-acuity, resource-intensive care that typically requires multidisciplinary teams, specialized operating suites, and advanced imaging support. Payment and utilization for such procedures carry implications for hospital capacity, specialty workforce planning, and high-cost episode management.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of typical clinical indications and sites of service, common billing modifiers associated with surgical and professional components, and the context needed to interpret reimbursement benchmarks where available. The publication also summarizes how CPT code 61710 fits within surgical service lines and highlights policy and coding considerations that affect billing and claims processing.

This summary is intended for hospital administrators, neurosurgeons, coding and billing professionals, and payers seeking a national perspective on coding, clinical context, and operational implications for high-acuity neurovascular procedures. Data not available in the input is noted where relevant.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare61710CPTneurosurgerycraniotomyembolizationneurovascularoperative-procedurehospital-OR

Billing Code Overview

CPT code 61710 describes a neurosurgical procedure in which a portion of the skull is removed (craniotomy) to access an intracranial vascular lesion — such as an aneurysm, vascular malformation, or carotid–cavernous fistula — followed by embolization to deliberately occlude the lesion's blood supply. This is an open cranial approach with endovascular embolization intended to treat abnormal intracranial blood vessels that pose risks of hemorrhage or neurologic compromise.

Service type: Open neurosurgical cranial procedure with embolization (surgical/therapeutic intervention).

Typical site of service: Hospital operating room or hybrid operating suite capable of both neurosurgery and endovascular procedures.

Clinical & Coding Specifications

Clinical Context

A 58-year-old male presents with sudden severe headache, nausea, and transient loss of consciousness. Imaging with CT angiography identifies a ruptured saccular intracranial aneurysm of the anterior communicating artery. Neurosurgery and interventional neuroradiology evaluate the patient. After multidisciplinary discussion, the patient is taken to the operating room for a craniotomy, microsurgical access to the aneurysm, and direct surgical or adjunctive endovascular embolization of the aneurysm neck to occlude the lesion’s blood supply and prevent rebleeding. The typical clinical workflow includes preoperative neurosurgical and neuroanesthesia evaluation, general endotracheal anesthesia, neuronavigation and microsurgical technique to remove a portion of the skull (craniotomy), intraoperative angiography or microcatheter embolization as indicated, hemostasis, skull bone flap replacement or craniectomy as clinically appropriate, and postoperative intensive care monitoring for vasospasm, hydrocephalus, and neurologic deficits. Typical perioperative documentation includes operative report detailing the craniotomy, description of the lesion, method of embolization, materials used, estimated blood loss, specimens, and condition on transfer to the ICU. Usual site of service is an inpatient operating room or hybrid angiography suite within a hospital.

Coding Specifications

Modifier	Description	When to Use
`11`	Normal/standard service	Use when the procedure represents the usual, uncomplicated service without unusual circumstances.
`22`	Increased procedural services	Use when documented work is substantially greater than typical due to complexity, extended operative time, or technical difficulty.
`23`	Unusual anesthesia	Use if general anesthesia was not used but significant sedation/anesthesia complications required unusual management.
`26`	Professional component	Use when reporting only the physician’s professional interpretation or surgical component separate from facility technical component.
`50`	Bilateral procedure	Use only if the same procedure is performed bilaterally in the same session and documentation supports bilateral work.
`51`	Multiple procedures	Use when multiple distinct procedures are billed the same day; append to secondary procedures per payer rules.
`52`	Reduced services	Use when the procedure was attempted but substantially reduced or not completed as documented.
`53`	Discontinued procedure	Use when the procedure was terminated due to extenuating circumstances and not completed.
`62`	Two surgeons	Use when two surgeons worked together as primary surgeons performing distinct portions of the procedure.
`78`	Return to OR for related procedure during global period	Use for an unplanned return to the operating room for a related procedure during the global postoperative period.
`80`	Assistant surgeon	Use when a qualified assistant surgeon is present and performs documented portions of the operation.
`81`	Minimum assistant surgeon	Use when a minimal assistant surgeon is documented.
`82`	Assistant surgeon (unusual circumstances)	Use when an assistant surgeon is used but the usual assistant surgeon is not available; documentation required.

Taxonomy Code	Specialty	Notes
207RH0000X	Neurosurgery	Primary specialty performing craniotomy and microsurgical aneurysm access and embolization.
174H00000X	Interventional Neuroradiology	Endovascular embolization and intraoperative angiography; often performs catheter-based embolization.
363A00000X	Vascular Surgery	May be involved for complex cerebrovascular lesions in some centers.
208800000X	Neurology	Preoperative and postoperative neurologic management and consultation.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I67.1`	Cerebral aneurysm, nonruptured	Indicates an intracranial aneurysm that may require elective craniotomy and embolization to prevent rupture.
`I60.0`	Subarachnoid hemorrhage from carotid siphon and middle cerebral artery	Represents ruptured aneurysm causing subarachnoid hemorrhage requiring emergent surgical access and embolization.
`I60.9`	Nontraumatic subarachnoid hemorrhage, unspecified	Used when SAH is present and source is an intracranial aneurysm treated with craniotomy and embolization.
`I72.9`	Arterial aneurysm, unspecified	General aneurysm code that may be used when intracranial aneurysm detail is limited.
`Q28.2`	Arteriovenous malformation	Congenital AVM of cerebral vessels that may be treated with surgical access and embolization.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61710`	Craniectomy or craniotomy for excision or evacuation of lesion with embolization of vascular malformation or aneurysm (as described)	Primary procedure coding the removal of skull bone to access and embolize an intracranial vascular lesion.
`61624`	Stereotactic radiosurgery, including planning; intracranial lesion	May be performed as an alternative or adjunct for selected vascular malformations not amenable to open embolization.
`61782`	Craniectomy or craniotomy; for excision or repair of vascular malformation, complex intracranial AVM	Used for excision or repair of arteriovenous malformations when resection is performed in addition to embolization.
`36245`	Selective catheter placement, cerebral, intrathoracic or intracranial, arterial, with angiography	Performed when intraoperative or preoperative diagnostic or therapeutic catheter angiography is required to localize lesion and guide embolization.
`36478`	Endovascular embolization or occlusion (e.g., coils, particles) via catheter, intracranial vessels	Codes endovascular embolization techniques that may be performed adjunctively or in hybrid approaches.