CPT 61684 Infratentorial AVM Resection Reimbursement | OpenPayer

Summary & Overview

CPT 61684: Resection of Small Infratentorial Arteriovenous Malformation

CPT code 61684 defines a neurosurgical craniotomy and resection of a simple infratentorial arteriovenous malformation (AVM) — specifically a lesion 3 cm or smaller, readily accessible, without deep venous drainage or involvement of eloquent cortical areas. This procedure represents a high-complexity operative service within neurosurgery and is significant nationally due to its association with specialized surgical teams, facility resource use, and potential for substantial variability in payer coverage and authorization requirements. Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical and billing context for CPT code 61684, including typical site of service and service-line designation; a summary of common modifiers encountered in neurosurgical operative billing; and where available, payer coverage patterns and authorization considerations. The publication highlights benchmarks and policy updates relevant to complex cranial procedures, outlines clinical indications implicit in the code description, and identifies gaps where diagnosis coding and taxonomy mappings are not provided. Data not available in the input are explicitly noted.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare61684CPTneurosurgeryarteriovenous malformationinfratentorial-surgerycraniotomyoperative-billingsurgical-resectionhospital-surgery

Billing Code Overview

CPT code 61684 describes a neurosurgical procedure in which a portion of the skull (craniotomy) is removed to expose and resect a simple arteriovenous malformation (AVM) located in the infratentorial region of the brain. The description specifies a lesion that is 3 cm or less, easily accessible, without deep venous drainage, and not involving cortical areas responsible for senses, speech, or language.

Service type: Surgical resection of a simple infratentorial arteriovenous malformation (neurosurgery)
Typical site of service: Hospital operating room, inpatient or same-day surgical setting (neurosurgical service line)

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

Clinical & Coding Specifications

Clinical Context

A 48-year-old right-handed patient presents with progressive headaches and a new cerebellar tremor. Neuroimaging (MRI brain with and without contrast and digital subtraction angiography) demonstrates a compact infratentorial arteriovenous malformation (AVM) localized to the cerebellar hemisphere, measuring 2.5 cm, without deep venous drainage and remote from eloquent cortex. The multidisciplinary cerebrovascular team (neurosurgeon, neurointerventionalist, neuroanesthesiologist) evaluates risks and determines microsurgical resection via a posterior fossa craniotomy is appropriate. The patient is admitted to an acute care hospital, undergoes preoperative anesthesia evaluation, intraoperative neuronavigation and neurophysiologic monitoring, and a suboccipital craniotomy with microsurgical AVM excision. Postoperative care includes ICU monitoring for neurovascular status and early postoperative imaging (CT or MRI) to confirm complete resection and exclude hemorrhage. The typical site of service is an inpatient acute care hospital operating room; anesthesia and professional surgical services are billed separately from the facility technical component.

Coding Specifications

Modifier	Description	When to Use
`62`	Two surgeons	When two surgeons of different specialties (eg, cerebrovascular neurosurgeon and skull base specialist) share primary responsibility for the procedure.

CPT 61692: Resection of Complex Dural Arteriovenous Malformation

CPT-61686-INFRATENTORIAL-AVM-RESECTION-COMPLEX

CPT 61686: Resection of Complex Infratentorial Arteriovenous Malformation

CPT-61698-INTRACRANIAL-VERTEBROBASILAR-ANEURYSM-REPAIR

CPT 61698: Intracranial Vertebrobasilar Aneurysm Repair

CPT-61710-CRANIOTOMY-EMBOLIZATION-INTRACRANIAL-VASCULAR-LESION

CPT 61710: Craniotomy with Embolization for Intracranial Vascular Lesions

CPT-61690-DURAL-AVM-RESECTION-CRANIECTOMY

CPT 61690: Craniectomy and Resection of Simple Dural Arteriovenous Malformation

CPT-61680-SUPRATENTORIAL-AVM-RESECTION-CRANIOTOMY

CPT 61680: Craniotomy with Resection of Supratentorial AVM

CPT-61711-EC-IC-BYPASS-MIDDLE-CEREBRAL-CORTICAL-ARTERY

CPT 61711: Extracranial–Intracranial Bypass, Middle Cerebral to Cortical Arteries

CPT-61697-INTRACRANIAL-ANEURYSM-REPAIR-INTERNAL-CAROTID

CPT 61697: Intracranial Aneurysm Repair, Internal Carotid Circulation

CPT-61682-COMPLEX-SUPRATENTORIAL-AVM-RESECTION-CRANIOTOMY

CPT 61682: Craniotomy for Resection of Complex Supratentorial AVM

CPT-61708-INTRACRANIAL-VASCULAR-LESION-ELECTROCOAGULATION

CPT 61708: Intracranial Vascular Lesion Destruction via Electric Current

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Taxonomy Code	Specialty	Notes
`207L00000X`	Neurological Surgery	Primary specialty performing posterior fossa craniotomies and AVM resections.
`2084P0800X`	Interventional Neuroradiology	Often involved in preoperative angiography and possible adjunct embolization planning.
`207T00000X`	Neurocritical Care	Manages postoperative ICU care and neurovascular monitoring.
`2086S0126X`	Vascular Neurology	Provides preoperative stroke and risk assessment; perioperative neurologic management.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I67.4`	Other cerebral aneurysm and arteriovenous malformation of cerebral vessels	Primary diagnosis for intracranial AVMs; indicates the vascular malformation targeted by resection.
`I60.9`	Nontraumatic subarachnoid hemorrhage, unspecified	AVM rupture can present with subarachnoid hemorrhage prompting urgent surgical management.
`I61.9`	Nontraumatic intracerebral hemorrhage, unspecified	Intracerebral hemorrhage from an AVM may necessitate evacuation and AVM resection.
`R51`	Headache	Common presenting symptom leading to imaging that detects an AVM.
`G44.1`	Vascular headache, not elsewhere classified (including migraine variants)	Can be a clinical manifestation prompting workup for vascular lesions.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61618`	Cranial decompression procedures, suboccipital craniectomy or craniotomy, posterior fossa; for microvascular decompression or posterior fossa access	Alternative or adjunct approach code for posterior fossa exposure; may describe the craniotomy portion in some documentation contexts.
`61790`	Stereotactic radiosurgery, intracranial (single session) for AVM (gamma knife, linear accelerator)	Non‑surgical stereotactic treatment option for small AVMs; used as alternative or adjunct when microsurgical resection is not feasible.
`61624`	Craniectomy or craniotomy for excision of vascular malformation, supratentorial	Related cranial AVM resection code for supratentorial lesions; useful for comparative coding when lesion location differs.
`61626`	Craniectomy or craniotomy for excision of vascular malformation, infratentorial, deep	Codes for more complex or deep infratentorial AVMs when involvement or deep venous drainage increases complexity beyond the simple AVM described by `61684`.
`36245`	Selective catheter placement, cerebrovascular arterial system, with angiography, radiological supervision and interpretation	Diagnostic cerebral angiography commonly performed preoperatively to define AVM nidus and venous drainage; billed by interventionalists.

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