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CPT 63251: Thoracic Spinal Arteriovenous Malformation Excision

CPT code 63251 represents a neurosurgical procedure to remove or occlude an arteriovenous malformation (AVM) involving the thoracic spinal cord. This procedure is clinically significant because spinal AVMs can produce progressive neurologic deficits, including lower extremity weakness, and carry risks of hemorrhage and permanent disability; timely definitive treatment is essential to prevent deterioration. Nationally, coverage and payment for complex spinal vascular procedures are an important driver of high-cost episodic care and influence referral patterns to tertiary neurosurgical centers.

Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for CPT code 63251, typical settings where the service is delivered, and the major payer considerations that affect authorization, site-of-service determination, and coding practice. The publication also outlines common modifiers associated with complex surgical claims, highlights benchmarking considerations for utilization and cost, and summarizes policy and coverage elements relevant to high-acuity spinal vascular procedures. Data not available in the input will be noted where applicable.

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Billing Code Overview

CPT code 63251 describes a surgical procedure to remove or close abnormal connections between arteries and veins—an arteriovenous malformation (AVM)—located within, on, or near the thoracic spinal cord. The procedure targets the AVM fistula and its draining veins to isolate and eradicate the abnormal vascular communication, address neurological dysfunction such as lower extremity weakness, and prevent progression of the condition.

Service type: Spinal vascular surgical procedure (open or microsurgical excision/ligation of spinal arteriovenous malformation)

Typical site of service: Inpatient hospital or specialized tertiary care surgical center (operating room with neurosurgical specialty support)

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CPT 63251: Thoracic Spinal Arteriovenous Malformation Excision

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Billing Code Overview

Service type: Spinal vascular surgical procedure (open or microsurgical excision/ligation of spinal arteriovenous malformation)

Typical site of service: Inpatient hospital or specialized tertiary care surgical center (operating room with neurosurgical specialty support)

Clinical & Coding Specifications

Clinical Context

A 46-year-old patient presents with progressive lower extremity weakness, numbness, and gait instability over several months. MRI of the thoracic spine and spinal angiography confirm a spinal arteriovenous malformation (AVM) with a high-flow fistulous connection and dilated draining veins compressing the thoracic spinal cord. The neurosurgery team recommends a microsurgical resection/closure of the AVM to isolate the fistula and obliterate draining veins to prevent further neurological decline and potential hemorrhage. Preoperative workflow includes neurological exam documentation, baseline motor and sensory assessments, MRI spine with and without contrast, spinal angiography for vascular mapping, informed consent detailing risks (including paralysis, CSF leak, infection), and coordination with anesthesia for possible intraoperative neuromonitoring (somatosensory and motor evoked potentials). The procedure is performed in an operating room under general anesthesia with the patient positioned prone; after laminectomy/laminoplasty at the target thoracic level, the surgeon microsurgically identifies the AVM, isolates arterial feeders, obliterates the fistula(s), and coagulates or clips draining veins as indicated. Postoperative care includes ICU or step-down monitoring, serial neurologic checks, postoperative MRI or angiography to confirm obliteration, pain control, wound care, and rehabilitation planning for gait and strength recovery.

Coding Specifications

Modifier	Description	When to Use
`00`	Service not covered by payer — placeholder administrative use	Rare administrative reporting when payer requires a code for non-covered services (use per payer rules)
`11`	Office/Outpatient or default modifier for primary service (CMS does not define `11` as standard; used here per input list as primary procedure)	Applied by some payers to indicate the primary procedure when required by local policy
`22`	Increased procedural services	When intraoperative complexity or time is substantially greater than typical for `63251` due to extensive dissection or unexpected findings
`23`	Unusual anesthesia	If general anesthesia is required when it ordinarily might be moderate sedation (rare for this procedure) or anesthesia complexity is increased
`26`	Professional component	When billing separates the professional component from facility billing (e.g., surgeon professional fee distinct from facility)
`50`	Bilateral procedure	If bilateral thoracic level interventions are reported (rare for focal spinal AVM)
`51`	Multiple procedures	When `63251` is performed the same day with unrelated additional procedures and payer requires a multiple-procedure modifier
`52`	Reduced services	If the procedure is partially reduced or aborted for documented clinical reasons
`53`	Discontinued procedure	When the operation is terminated before completion due to patient instability or intraoperative complication
`62`	Two surgeons	When a co-surgeon with distinct skills (e.g., vascular neurosurgeon plus spine surgeon) performs portions of the procedure
`63`	Procedures on infants/young patients (aged under 4)	Use when patient age qualifies per payer policies (unlikely for typical adult thoracic AVM)
`78`	Return to OR for related procedure during postoperative global period	If patient returns to OR for a complication related to the original `63251` repair during the global period
`79`	Unrelated procedure during global period (not listed in provided modifiers)	Data not available in the input.
`80`	Assistant surgeon	When a surgical assistant (non-physician or physician assistant) performs documented assisting tasks

Taxonomy Code	Specialty	Notes
`207Y00000X`	Neurological Surgery	Neurosurgeons most commonly perform microsurgical resection/obliteration of spinal AVMs
`2084P0800X`	Orthopaedic Spine Surgery	Orthopaedic spine surgeons with complex spinal vascular experience may participate in decompression/approach
`208000000X`	Physical Medicine & Rehabilitation	Physiatrists manage postoperative rehabilitation and functional recovery
`363L00000X`	Interventional Radiology (Vascular & Interventional Radiology)	Interventional neuroradiologists perform preoperative diagnostic spinal angiography and may perform endovascular embolization adjuncts

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I60.1`	Nontraumatic subarachnoid hemorrhage from middle cerebral artery	Data not available in the input.
`Q28.2`	Arteriovenous malformation of cerebral vessels	Data not available in the input.
`G95.1`	Vascular myelopathies, not elsewhere classified	Spinal vascular lesion causing myelopathy; clinically relevant when AVM causes spinal cord dysfunction necessitating `63251`
`I67.1`	Cerebral aneurysm, nonruptured	Data not available in the input.
`M48.06`	Spinal stenosis, thoracic region	May be listed as comorbidity if compressive changes coexist but not a primary indication for `63251`

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`62280`	Laminectomy, facetectomy and foraminotomy (spinal cord)	May be used for surgical exposure such as laminectomy/laminotomy at the thoracic level to access the AVM prior to performing `63251`
`61790`	Puncture of cranial subarachnoid space for diagnostic or therapeutic purposes (not spinal)	Data not available in the input.
`61624`	Angiography, intracranial, selective, catheter-based	Preoperative diagnostic spinal/segmental angiography is commonly performed (use spinal equivalents) to map feeding arteries prior to `63251`
`76001`	Fluoroscopic guidance for needle placement (first image)	Intraoperative fluoroscopy may be used to localize spinal levels and guide bony exposure during the procedure
`95940`	Spinal cord stimulation trial or evaluation (neurophysiology monitoring codes vary)	Intraoperative neuromonitoring for spinal cord function (SSEP/MEP) is commonly documented and billed separately; use appropriate neurophysiology codes

CPT 63250: Cervical Spinal Arteriovenous Malformation Obliteration

CPT-63252-SPINAL-ARTERIOVENOUS-MALFORMATION-RESECTION-THORACOLUMBAR

CPT 63252: Resection/Obliteration of Thoracolumbar Spinal Arteriovenous Malformation

CPT-63265-CERVICAL-EXTRADURAL-GROWTH-REMOVAL-LAMINECTOMY

CPT 63265: Cervical Extradural Growth Removal via Laminectomy

CPT-63266-THORACIC-EXTRADURAL-MASS-EXCISION-LAMINECTOMY

CPT 63266: Thoracic Extradural Mass Excision via Laminectomy

CPT-63267-LUMBAR-EXTRADURAL-LESION-LAMINECTOMY

CPT 63267: Lumbar Extradural Lesion Evacuation via Laminectomy

CPT-63268-SACRAL-SPINE-EXTRADURAL-GROWTH-LAMINECTOMY

CPT 63268: Sacral Spine Extradural Growth Removal via Laminectomy

CPT-63270-CERVICAL-INTRADURAL-TUMOR-RESECTION-LAMINECTOMY

CPT 63270: Cervical Intradural Tumor Resection via Laminectomy

CPT-63271-THORACIC-INTRADURAL-LESION-RESECTION-LAMINECTOMY

CPT 63271: Thoracic Intradural Lesion Resection via Laminectomy

CPT-63272-LUMBAR-INTRADURAL-TUMOR-REMOVAL-LAMINECTOMY

CPT 63272: Lumbar Intradural Tumor Removal via Laminectomy

CPT-63273-SACRAL-LAMINECTOMY-INTRADURAL-LESION-EXCISION

CPT 63273: Sacral Laminectomy with Intradural Lesion Excision

Showing 1–10 of 23

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
`00`	Service not covered by payer — placeholder administrative use	Rare administrative reporting when payer requires a code for non-covered services (use per payer rules)
`11`	Office/Outpatient or default modifier for primary service (CMS does not define `11` as standard; used here per input list as primary procedure)	Applied by some payers to indicate the primary procedure when required by local policy
`22`	Increased procedural services	When intraoperative complexity or time is substantially greater than typical for `63251` due to extensive dissection or unexpected findings
`23`	Unusual anesthesia	If general anesthesia is required when it ordinarily might be moderate sedation (rare for this procedure) or anesthesia complexity is increased
`26`	Professional component	When billing separates the professional component from facility billing (e.g., surgeon professional fee distinct from facility)
`50`	Bilateral procedure	If bilateral thoracic level interventions are reported (rare for focal spinal AVM)
`51`	Multiple procedures	When `63251` is performed the same day with unrelated additional procedures and payer requires a multiple-procedure modifier
`52`	Reduced services	If the procedure is partially reduced or aborted for documented clinical reasons
`53`	Discontinued procedure	When the operation is terminated before completion due to patient instability or intraoperative complication
`62`	Two surgeons	When a co-surgeon with distinct skills (e.g., vascular neurosurgeon plus spine surgeon) performs portions of the procedure
`63`	Procedures on infants/young patients (aged under 4)	Use when patient age qualifies per payer policies (unlikely for typical adult thoracic AVM)
`78`	Return to OR for related procedure during postoperative global period	If patient returns to OR for a complication related to the original `63251` repair during the global period
`79`	Unrelated procedure during global period (not listed in provided modifiers)	Data not available in the input.
`80`	Assistant surgeon	When a surgical assistant (non-physician or physician assistant) performs documented assisting tasks

Taxonomy Code	Specialty	Notes
`207Y00000X`	Neurological Surgery	Neurosurgeons most commonly perform microsurgical resection/obliteration of spinal AVMs
`2084P0800X`	Orthopaedic Spine Surgery	Orthopaedic spine surgeons with complex spinal vascular experience may participate in decompression/approach
`208000000X`	Physical Medicine & Rehabilitation	Physiatrists manage postoperative rehabilitation and functional recovery
`363L00000X`	Interventional Radiology (Vascular & Interventional Radiology)	Interventional neuroradiologists perform preoperative diagnostic spinal angiography and may perform endovascular embolization adjuncts

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I60.1`	Nontraumatic subarachnoid hemorrhage from middle cerebral artery	Data not available in the input.
`Q28.2`	Arteriovenous malformation of cerebral vessels	Data not available in the input.
`G95.1`	Vascular myelopathies, not elsewhere classified	Spinal vascular lesion causing myelopathy; clinically relevant when AVM causes spinal cord dysfunction necessitating `63251`
`I67.1`	Cerebral aneurysm, nonruptured	Data not available in the input.
`M48.06`	Spinal stenosis, thoracic region	May be listed as comorbidity if compressive changes coexist but not a primary indication for `63251`

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`62280`	Laminectomy, facetectomy and foraminotomy (spinal cord)	May be used for surgical exposure such as laminectomy/laminotomy at the thoracic level to access the AVM prior to performing `63251`
`61790`	Puncture of cranial subarachnoid space for diagnostic or therapeutic purposes (not spinal)	Data not available in the input.
`61624`	Angiography, intracranial, selective, catheter-based	Preoperative diagnostic spinal/segmental angiography is commonly performed (use spinal equivalents) to map feeding arteries prior to `63251`
`76001`	Fluoroscopic guidance for needle placement (first image)	Intraoperative fluoroscopy may be used to localize spinal levels and guide bony exposure during the procedure
`95940`	Spinal cord stimulation trial or evaluation (neurophysiology monitoring codes vary)	Intraoperative neuromonitoring for spinal cord function (SSEP/MEP) is commonly documented and billed separately; use appropriate neurophysiology codes

CPT 63250: Cervical Spinal Arteriovenous Malformation Obliteration

CPT-63252-SPINAL-ARTERIOVENOUS-MALFORMATION-RESECTION-THORACOLUMBAR

CPT 63252: Resection/Obliteration of Thoracolumbar Spinal Arteriovenous Malformation

CPT-63265-CERVICAL-EXTRADURAL-GROWTH-REMOVAL-LAMINECTOMY

CPT 63265: Cervical Extradural Growth Removal via Laminectomy

CPT-63266-THORACIC-EXTRADURAL-MASS-EXCISION-LAMINECTOMY

CPT 63266: Thoracic Extradural Mass Excision via Laminectomy

CPT-63267-LUMBAR-EXTRADURAL-LESION-LAMINECTOMY

CPT 63267: Lumbar Extradural Lesion Evacuation via Laminectomy

CPT-63268-SACRAL-SPINE-EXTRADURAL-GROWTH-LAMINECTOMY

CPT 63268: Sacral Spine Extradural Growth Removal via Laminectomy

CPT-63270-CERVICAL-INTRADURAL-TUMOR-RESECTION-LAMINECTOMY

CPT 63270: Cervical Intradural Tumor Resection via Laminectomy

CPT-63271-THORACIC-INTRADURAL-LESION-RESECTION-LAMINECTOMY

CPT 63271: Thoracic Intradural Lesion Resection via Laminectomy

CPT-63272-LUMBAR-INTRADURAL-TUMOR-REMOVAL-LAMINECTOMY

CPT 63272: Lumbar Intradural Tumor Removal via Laminectomy

CPT-63273-SACRAL-LAMINECTOMY-INTRADURAL-LESION-EXCISION

CPT 63273: Sacral Laminectomy with Intradural Lesion Excision

Showing 1–10 of 23

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.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 63251: Thoracic Spinal Arteriovenous Malformation Excision

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Billing Code Overview

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CPT 63251: Thoracic Spinal Arteriovenous Malformation Excision

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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