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

Headline: CPT code 61613 covers middle cranial fossa surgical excision of cavernous sinus vascular lesions

Lead: CPT code 61613 denotes a neurosurgical approach via the middle cranial fossa to remove carotid aneurysms, arteriovenous malformations, or carotid–cavernous fistulas within the cavernous sinus. This complex cranial vascular procedure is performed in specialized surgical settings and carries implications for hospital resource use, specialty reimbursement, and clinical outcomes.

What the code represents and why it matters: CPT code 61613 identifies a high-acuity neurosurgical procedure for intracranial vascular pathology in the cavernous sinus. Nationally, accurate coding of such procedures affects case mix, facility reimbursement, quality measurement, and comparative benchmarking for cerebrovascular care.

Key payers covered: Analysis typically addresses coverage and payment patterns from major national payers including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

What readers will learn: The publication provides clinical context for the procedure, outlines expected sites of service, and summarizes common billing considerations. Readers will find benchmarking information, policy and coding guidance relevant to payers listed above, and context for how this code is used in surgical and inpatient billing workflows.

Data availability: Data not available in the input for associated taxonomies, ICD-10 diagnoses, related codes, and detailed payer-specific reimbursement amounts.

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Billing Code Overview

CPT code 61613 describes a neurosurgical procedure using a middle cranial fossa approach to excise a carotid aneurysm, arteriovenous malformation, or carotid–cavernous fistula located in the cavernous sinus of the head. This procedure is a surgical cranial intervention directed at vascular lesions within the cavernous sinus region.

Service Type: Neurosurgical excision of vascular lesion (middle cranial fossa approach)

Typical Site of Service: Hospital operating room or tertiary care surgical center (inpatient or outpatient surgical setting depending on clinical indications and institutional protocols)

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

Headline: CPT code 61613 covers middle cranial fossa surgical excision of cavernous sinus vascular lesions

Key payers covered: Analysis typically addresses coverage and payment patterns from major national payers including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Data availability: Data not available in the input for associated taxonomies, ICD-10 diagnoses, related codes, and detailed payer-specific reimbursement amounts.

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Get alerted when payer policies referencing 61613 are released or updated.

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Billing Code Overview

Service Type: Neurosurgical excision of vascular lesion (middle cranial fossa approach)

Typical Site of Service: Hospital operating room or tertiary care surgical center (inpatient or outpatient surgical setting depending on clinical indications and institutional protocols)

Clinical & Coding Specifications

Clinical Context

A 54-year-old patient presents with progressive cranial neuropathies, pulsatile exophthalmos, and intermittent epistaxis. Neuroimaging (CTA/MRA and diagnostic cerebral angiography) demonstrates a carotid–cavernous fistula within the cavernous sinus with associated arterialized venous drainage and a high-flow communication. After multidisciplinary review, the patient is scheduled for surgical repair via a middle cranial fossa approach to directly access the cavernous sinus for excision/repair of the lesion. The preoperative workflow includes neurosurgical and neurointerventional evaluation, anesthesia assessment, informed consent detailing risks (cranial nerve deficits, hemorrhage, stroke), and perioperative planning for intraoperative neurophysiologic monitoring and blood product availability. Intraoperatively, the patient undergoes a temporal craniotomy with middle cranial fossa exposure, microsurgical dissection to the cavernous sinus, identification and excision/ligation of the fistulous connection or aneurysm, hemostasis, and dura/skull closure. Postoperatively, the patient is monitored in a neurocritical care unit with serial neurologic exams and follow-up vascular imaging to confirm obliteration of the lesion and to detect complications such as cranial neuropathies or residual fistula.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when reporting only the physician’s professional portion if a separate technical component is billed by the facility.
`62`	Two surgeons	Use when two surgeons of different specialties perform distinct portions of the operation (eg, neurosurgeon and head & neck vascular surgeon).
`80`	Assistant surgeon	Use when a qualified assistant surgeon performs services assisting the primary surgeon.
`62`	(duplicate removed)	(duplicate removed)
`22`	Increased procedural services	Use when the service requires substantially greater work than typical (document the reasons and submit supporting operative report).
`52`	Reduced services	Use when the procedure is partially reduced or not completed as planned.
`53`	Discontinued procedure	Use when the procedure is started but discontinued for patient-related or intraoperative reasons.
`78`	Unplanned return to OR for related procedure during postoperative period	Use when the patient returns to the operating room for a related procedure during the global period.
`79`	(not in list)	Data not provided in the input.
`63`	Procedure performed on infants less than 4 kg	Use if applicable for neonatal cases that meet weight criteria.
`76`	(not in list)	Data not provided in the input.
`73`	Discontinued outpatient hospital/ambulatory surgery center (ASC) before anesthesia	Use when procedure is discontinued prior to administration of anesthesia in the outpatient/ASC setting.
`53`	(duplicate removed)	(duplicate removed)
`11`	(Normally not a modifier; in provided list)	Use when reporting as the initial encounter level in some systems (rarely used for CPT billing; include only if local payer requires).

Taxonomy Code	Specialty	Notes
`207L00000X`	Neurological Surgery	Primary specialty that performs cavernous sinus/middle cranial fossa surgical approaches.
`207RH0000X`	Vascular Neurology / Neurointerventional Surgery	Specialists who may perform diagnostic angiography and endovascular planning or adjunctive procedures.
`2084P0800X`	Oral and Maxillofacial Surgery	Occasionally involved for skull base exposure or reconstructive portions in multidisciplinary cases.
`206E00000X`	Emergency Medicine	Involved for acute presentation stabilization; not the surgical provider but part of care continuum.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I67.1`	Cerebral aneurysm, nonruptured	Cavernous carotid aneurysms that may require middle cranial fossa surgical access for excision.
`Q28.2`	Arteriovenous malformation of cerebral vessels	AVMs located in or adjacent to the cavernous sinus that may be surgically resected via this approach.
`I77.6`	Arteriovenous fistula	Includes carotid–cavernous fistulae requiring surgical repair.
`H05.4`	Orbital varix and other orbital vascular malformations	Related regional vascular lesions causing ocular symptoms that may be associated with cavernous sinus pathology.
`S06.5X9A`	Traumatic subdural hemorrhage with loss of consciousness of unspecified duration, initial encounter	Represents traumatic etiologies that can lead to fistula formation; may be part of the clinical history prompting evaluation.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61613`	Middle cranial fossa approach for excision of carotid aneurysm, arteriovenous malformation, or carotid–cavernous fistula in the cavernous sinus	Primary procedure code for this surgical approach.
`36215`	Selective catheter placement, cerebral, with angiography (diagnostic)	Commonly performed preoperatively for lesion characterization and intraoperative planning.
`61618`	Craniotomy for excision of vascular malformation, complicated location (skull base)	Alternative or adjunct skull base vascular resection code when additional extensive craniotomy work is required.
`76937`	Ultrasound guidance for vascular access	May be used for central or arterial access for monitoring or angiography during the perioperative period.
`99152`	Moderate sedation services provided by the same physician performing a procedure (initial 15 minutes)	May apply if moderate sedation rather than general anesthesia is used in certain settings (use depends on payer and setting).

CPT 61605: Extradural Middle Cranial Fossa Neoplasm Resection

CPT-61606-MIDDLE-CRANIAL-FOSSA-INTRADURAL-LESION-EXCISION

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

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

CPT 61607: Extradural Skull Base Neoplasm Resection

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

CPT 61608: Intradural Resection of Skull Base Neoplasm

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

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

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when reporting only the physician’s professional portion if a separate technical component is billed by the facility.
`62`	Two surgeons	Use when two surgeons of different specialties perform distinct portions of the operation (eg, neurosurgeon and head & neck vascular surgeon).
`80`	Assistant surgeon	Use when a qualified assistant surgeon performs services assisting the primary surgeon.
`62`	(duplicate removed)	(duplicate removed)
`22`	Increased procedural services	Use when the service requires substantially greater work than typical (document the reasons and submit supporting operative report).
`52`	Reduced services	Use when the procedure is partially reduced or not completed as planned.
`53`	Discontinued procedure	Use when the procedure is started but discontinued for patient-related or intraoperative reasons.
`78`	Unplanned return to OR for related procedure during postoperative period	Use when the patient returns to the operating room for a related procedure during the global period.
`79`	(not in list)	Data not provided in the input.
`63`	Procedure performed on infants less than 4 kg	Use if applicable for neonatal cases that meet weight criteria.
`76`	(not in list)	Data not provided in the input.
`73`	Discontinued outpatient hospital/ambulatory surgery center (ASC) before anesthesia	Use when procedure is discontinued prior to administration of anesthesia in the outpatient/ASC setting.
`53`	(duplicate removed)	(duplicate removed)
`11`	(Normally not a modifier; in provided list)	Use when reporting as the initial encounter level in some systems (rarely used for CPT billing; include only if local payer requires).

Taxonomy Code	Specialty	Notes
`207L00000X`	Neurological Surgery	Primary specialty that performs cavernous sinus/middle cranial fossa surgical approaches.
`207RH0000X`	Vascular Neurology / Neurointerventional Surgery	Specialists who may perform diagnostic angiography and endovascular planning or adjunctive procedures.
`2084P0800X`	Oral and Maxillofacial Surgery	Occasionally involved for skull base exposure or reconstructive portions in multidisciplinary cases.
`206E00000X`	Emergency Medicine	Involved for acute presentation stabilization; not the surgical provider but part of care continuum.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I67.1`	Cerebral aneurysm, nonruptured	Cavernous carotid aneurysms that may require middle cranial fossa surgical access for excision.
`Q28.2`	Arteriovenous malformation of cerebral vessels	AVMs located in or adjacent to the cavernous sinus that may be surgically resected via this approach.
`I77.6`	Arteriovenous fistula	Includes carotid–cavernous fistulae requiring surgical repair.
`H05.4`	Orbital varix and other orbital vascular malformations	Related regional vascular lesions causing ocular symptoms that may be associated with cavernous sinus pathology.
`S06.5X9A`	Traumatic subdural hemorrhage with loss of consciousness of unspecified duration, initial encounter	Represents traumatic etiologies that can lead to fistula formation; may be part of the clinical history prompting evaluation.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61613`	Middle cranial fossa approach for excision of carotid aneurysm, arteriovenous malformation, or carotid–cavernous fistula in the cavernous sinus	Primary procedure code for this surgical approach.
`36215`	Selective catheter placement, cerebral, with angiography (diagnostic)	Commonly performed preoperatively for lesion characterization and intraoperative planning.
`61618`	Craniotomy for excision of vascular malformation, complicated location (skull base)	Alternative or adjunct skull base vascular resection code when additional extensive craniotomy work is required.
`76937`	Ultrasound guidance for vascular access	May be used for central or arterial access for monitoring or angiography during the perioperative period.
`99152`	Moderate sedation services provided by the same physician performing a procedure (initial 15 minutes)	May apply if moderate sedation rather than general anesthesia is used in certain settings (use depends on payer and setting).

CPT 61605: Extradural Middle Cranial Fossa Neoplasm Resection

CPT-61606-MIDDLE-CRANIAL-FOSSA-INTRADURAL-LESION-EXCISION

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

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

CPT 61607: Extradural Skull Base Neoplasm Resection

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

CPT 61608: Intradural Resection of Skull Base Neoplasm

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

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

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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

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Billing Code Overview

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

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References