CPT 70471: CT Angiography of Head and Neck, Cerebral Vessels - OpenPayer

Summary & Overview

CPT 70471: CT Angiography of Head and Neck, Cerebral Vessels

CPT code 70471 designates computed tomographic angiography (CTA) of the head and neck with imaging of cerebral vessels and computer‑based postprocessing; noncontrast images, if performed, are considered part of the study. As a focused vascular imaging procedure, this CPT code is widely used in acute stroke evaluation, cerebrovascular disease assessment, and pre‑operative vascular mapping, making it a clinically critical service across inpatient and outpatient settings. Nationally, CTA of the head and neck is an established diagnostic modality with implications for triage, treatment planning, and quality measurement in cerebrovascular care.

Key payers included in this overview are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise summary of what CPT code 70471 represents, typical service settings, and payer coverage context. The publication provides benchmarks and reimbursement context where available, notes of recent policy and coding guidance relevant to CTA services, and clinical considerations that affect utilization (for example, integration with noncontrast CT and contrast administration protocols).

This summary is intended for a national audience of hospital administrators, radiology departments, billing and coding professionals, and policy analysts seeking a clear reference on the clinical intent and billing context of CPT code 70471. Data not available in the input is identified and omitted from the narrative.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 70471CT angiographyhead and neck imagingdiagnostic radiologycerebral vesselsoutpatient imagingmedical billingradiology coding

Billing Code Overview

CPT code 70471 describes a computed tomographic angiography (CTA) study of the head and neck, including cerebral vessels. The service uses intravenous contrast dye to visualize blood vessels and includes computer‑based postprocessing of the images. Noncontrast images, when performed as part of the same encounter, are included in the service description.

Service Type: Diagnostic imaging — CT angiography (head and neck)

Typical Site of Service: Hospital outpatient imaging center, outpatient radiology clinic, or ambulatory imaging center

Clinical & Coding Specifications

Clinical Context

A 62-year-old patient presents to the emergency department with acute-onset severe focal neurological deficit and severe headache. The emergency physician suspects an intracranial vascular event such as ischemic stroke, subarachnoid hemorrhage, or large-vessel occlusion. After initial stabilization and evaluation, the patient is referred for computed tomographic angiography of the head and neck to evaluate arterial and venous vasculature, identify vessel occlusion, stenosis, aneurysm, dissection, or vascular malformation. The imaging study is performed in the CT angiography suite or hospital radiology department. Intravenous iodinated contrast is administered via power injector; noncontrast head CT images may be obtained immediately before CTA when indicated (for example, to exclude acute hemorrhage). The technologist acquires the CTA with thin-section helical technique and timing bolus or automated bolus tracking; the radiologist performs computer-based postprocessing (including 3D reconstructions and maximum intensity projections) and interprets the study, generating a report that documents vessel patency, stenosis percentage if present, aneurysm size and location, arterial dissection, and any acute infarct or hemorrhage seen on noncontrast images. Clinical workflow includes order entry with indication, screening for contrast allergy and kidney function, IV placement, image acquisition, postprocessing, radiologist interpretation, and communication of critical results to the treating team.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component

CPT 70557: Intraoperative Non-Contrast Brain MRI Including Brain Stem and Skull Base

70470

CPT 70470: CT Scan of Head or Brain with and without Contrast

cpt-70130-mastoid-x-ray-series-mastoiditis-vestibular-evaluation

CPT 70130: Mastoid X‑Ray Series for Mastoiditis and Vestibular Evaluation

cpt-70496-ct-angiography-head-intravenous-contrast

CPT 70496: CT Angiography of Head with Intravenous Contrast

cpt-70360-throat-neck-endoscopic-visualization-foreign-body

CPT 70360: Throat and Neck Endoscopic Visualization for Obstruction or Foreign Body

70548

CPT 70548: Magnetic Resonance Angiography of the Head with and without Contrast

cpt-70320-complete-dental-radiographic-examination

CPT 70320: Complete Dental Radiographic Examination

cpt-70332-tmj-arthrography-diagnostic

CPT 70332: Arthrography of Temporomandibular Joint (TMJ)

cpt-70554-functional-brain-fmri

CPT 70554: Functional Brain fMRI Mapping

cpt-70549-mra-neck-with-and-without-contrast

CPT 70549: Magnetic Resonance Angiography of Neck Vessels With and Without Contrast

Showing 1–10 of 66

Taxonomy Code	Specialty	Notes
207RC0000X	Radiology	Diagnostic radiologists routinely interpret CT angiography of the head and neck.
207RA0000X	Diagnostic Radiology	Includes radiologists who perform and interpret advanced vascular imaging.
2080P0202X	Neurology	Vascular neurologists commonly order and use CTA results for stroke management decisions.
2084N0402X	Emergency Medicine	Emergency physicians frequently order emergent head and neck CTA for acute cerebrovascular presentations.
2085R0202X	Neuroradiology	Neuroradiologists provide subspecialty interpretation and advanced postprocessing for cerebral vascular imaging.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I63.9`	Cerebral infarction, unspecified	CTA evaluates intracranial and extracranial arteries for occlusion or stenosis causing ischemic stroke.
`I61.9`	Intracerebral hemorrhage, unspecified	Noncontrast CT plus CTA may be used to identify vascular lesions associated with hemorrhage such as aneurysm or AVM.
`I60.9`	Subarachnoid hemorrhage, unspecified	CTA identifies aneurysms or vessel abnormalities causing subarachnoid hemorrhage.
`I65.29`	Occlusion and stenosis of unspecified carotid artery	CTA assesses carotid and vertebral arteries for diagnostic stenosis and occlusion.
`I77.71`	Thoracic aortic dissection	CTA of head/neck may be performed when dissection extends into great vessels or to evaluate cerebral perfusion.
`G45.9`	Transient cerebral ischemic attack, unspecified	CTA can be used to detect high-grade stenosis or embolic sources after TIA.
`I72.3`	Aneurysm of cerebral arteries	CTA defines aneurysm size, neck, and relationship to parent vessels for treatment planning.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`70450`	Computed tomography, head or brain; without contrast material	Often acquired immediately before CTA to evaluate for acute hemorrhage; noncontrast images are included when performed with CTA but may be billed separately if performed and reported independently.
`70460`	Computed tomography, head or brain; with contrast material(s)	May represent contrast-enhanced head CT without angiographic technique; differentiated from CTA by protocol and postprocessing.
`70480`	Computed tomography, head or brain; with and without contrast material	Alternative billing when both noncontrast and contrast-enhanced head CT are performed but not coded as CTA.
`71275`	Computed tomography, thorax, with contrast, angiography for pulmonary embolism (CTA)	CTA of other vascular territories often performed in conjunction for suspected embolic disease or vascular assessment; demonstrates common CTA technique parallels.
`74174`	Computed tomography, abdomen and pelvis; with contrast material, including CTA protocols when indicated	Used when concurrent CTA of neck/abdomen/aorta is performed for extended vascular evaluation (for example, suspected dissection extending beyond neck vessels).

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