CPT 70472: CT Cerebral Perfusion Analysis

CPT code 70472 denotes CT cerebral perfusion analysis performed at the same session as a head CT or CT angiography. The add‑on procedure quantifies cerebral blood flow and volume through imaging obtained with and without contrast plus postprocessing, supporting diagnosis and management of acute stroke, vascular occlusion, and other perfusion‑related brain pathology. Nationally, CT perfusion analysis is an important advanced imaging tool used in emergency and inpatient pathways to guide time‑sensitive clinical decisions.

This analysis covers major national payers including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context, typical sites of service, and the billing role of an add‑on perfusion code reported alongside primary head CT/CTA procedures. The publication summarizes common reimbursement considerations and benchmark themes, highlights policy and coverage factors relevant to perfusion imaging, and identifies coding relationships clinicians and billing staff should track when submitting claims.

The content is intended for a national audience of radiology, neurology, emergency medicine, and revenue cycle stakeholders who need a clear briefing on how CPT code 70472 fits into diagnostic workflows and payer coverage patterns. Data not available in the input is noted where applicable.

Billing Code Overview

CPT code 70472 describes CT cerebral perfusion analysis performed at the same session as a CT or CTA of the head. The service measures blood flow to regions of the brain and includes imaging obtained both with and without contrast plus image postprocessing. This CPT code is an add‑on service reported in conjunction with a primary CT or CTA procedure of the head.

Service Type

Advanced diagnostic imaging — CT perfusion analysis

Typical Site of Service

Hospital outpatient imaging departments
Freestanding radiology or imaging centers

Data not available in the input.

Clinical Context

A typical patient is an adult presenting to the emergency department with acute neurologic deficits such as sudden hemiparesis, aphasia, or altered consciousness suspicious for acute ischemic stroke. After rapid triage and noncontrast head CT to exclude hemorrhage, the ordering provider requests a CT angiography (CTA) of the head and neck to assess vessel occlusion and, at the same session, CT cerebral perfusion analysis to evaluate areas of reduced cerebral blood flow, cerebral blood volume, and mean transit time. The CT perfusion service 70472 is performed during the same imaging encounter as the primary head CT or CTA and includes acquisition with and without contrast plus postprocessing to generate perfusion maps. Typical workflow: emergency clinician orders stroke protocol CT → patient transported to CT suite → technologist performs noncontrast CT ± CTA → contrast bolus and dynamic perfusion acquisition performed → radiologist or trained imaging specialist performs postprocessing and interprets perfusion maps to guide acute reperfusion decisions (e.g., thrombectomy candidacy, IV thrombolysis window extension). Typical site of service is the hospital-based emergency department and inpatient radiology department with CT capability; outpatient imaging centers may perform this if appropriate for non-emergent indications.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when only the physician interpretation/report is billed separate from technical imaging.

Taxonomy Code	Specialty	Notes
`2080P0800X`	Diagnostic Radiology	Radiologists interpret CT perfusion studies and oversee imaging protocols.
`2084P0800X`	Neuroradiology	Subspecialists commonly perform and interpret advanced perfusion postprocessing for stroke.
`207RC0000X`	Emergency Medicine	Emergency physicians order stroke imaging and coordinate acute workflow.
`261QQ0500X`	Vascular Neurology	Neurologists and stroke specialists use perfusion results to determine reperfusion therapy candidacy.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I63.9`	Cerebral infarction, unspecified	Common indication for CT perfusion to identify ischemic penumbra and infarct core.
`I63.3`	Cerebral infarction due to thrombosis of cerebral arteries	Perfusion imaging helps localize territory of decreased perfusion and guide reperfusion therapy.
`I63.5`	Cerebral infarction due to unspecified embolism	Used to evaluate salvageable tissue in embolic stroke presentations.
`I61.9`	Intracerebral hemorrhage, unspecified	Perfusion is contraindicated if hemorrhage is present on noncontrast CT; code included because imaging workflow begins with noncontrast CT to exclude bleed.
`G45.9`	Transient cerebral ischemic attack, unspecified	In select cases perfusion may be used to evaluate transient deficits or prolonged symptoms to rule out evolving infarct.
`R55`	Syncope and collapse	Occasionally part of differential; when neurologic deficits are present, CT perfusion may be used as part of stroke evaluation.
`H34.1`	Retinal artery occlusion	In select vascular occlusive conditions, perfusion imaging can be used to assess cerebral involvement or concurrent stroke risk.
`I67.6`	Nonpyogenic thrombosis of intracranial venous system	Perfusion may assist in assessing cerebral hemodynamics in complex vascular conditions.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`70450`	Computed tomography, head or brain; without contrast material	Often the initial noncontrast study in stroke evaluation performed immediately prior to perfusion imaging.
`70460`	Computed tomography, head or brain; with contrast material(s)	May be performed when contrast-enhanced imaging is needed in addition to noncontrast CT and perfusion.
`70496`	Computed tomography, angiography, head/neck, with contrast and image postprocessing; without CT perfusion	CTA of head/neck is commonly performed alongside perfusion; `70472` is an add-on for perfusion analysis performed at the same session.
`70544`	Magnetic resonance imaging, brain (MR), without contrast material, followed by with contrast material and further sequences (dynamic perfusion-specific MR codes exist but CT perfusion is distinct)	MR perfusion is an alternative modality; listed for clinical workflow alternatives but not billed with `70472` in same session.

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Summary & Overview