CPT 78494 SPECT Gated Equilibrium Reimbursement | OpenPayer

Summary & Overview

CPT 78494: SPECT Gated Equilibrium Rest Cardiac Function

CPT code 78494 represents a rest single–photon emission computed tomography (SPECT) gated equilibrium study used to evaluate cardiac pumping function and blood flow distribution. Nationally, this nuclear cardiology procedure is an important tool for quantifying left ventricular function and detecting regional wall motion abnormalities without stress, informing diagnosis and management of cardiac conditions.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication summarizes coverage patterns and reimbursement context across major commercial and federal payers, while situating CPT code 78494 within clinical imaging workflows.

Readers will learn concise clinical context for the code, typical sites of service and service type, and the kinds of benchmarks and policy details commonly relevant for this procedure. The report also highlights how CPT code 78494 is used in practice, what to expect in terms of where the service is delivered, and points of comparison that stakeholders monitor, such as utilization and payer coverage trends. Data not available in the input will be noted as such in relevant sections.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 78494nuclear cardiologySPECTgated equilibriumcardiac imagingrest myocardial studyimaging billingprocedure coding

Billing Code Overview

CPT code 78494 describes a single–photon emission computed tomography (SPECT) gated equilibrium study performed at rest to evaluate cardiac pumping function and blood flow distribution. The procedure uses radioactive tracers and SPECT imaging to assess left ventricular function and global or regional myocardial performance while the patient is at rest.

Service Type: Nuclear cardiology imaging (SPECT), gated equilibrium, rest study

Typical Site of Service: Hospital outpatient imaging center, freestanding nuclear medicine or cardiology imaging suite

Clinical & Coding Specifications

Clinical Context

A typical patient is a 68-year-old male with a history of ischemic cardiomyopathy and new onset exertional dyspnea referred from cardiology for a resting gated equilibrium SPECT radionuclide ventriculography to quantify left ventricular ejection fraction and regional wall motion at rest. The workflow begins with preauthorization and verification of patient identity and allergies, followed by intravenous injection of a radiopharmaceutical labeled red blood cell tracer. After equilibrium labeling, the nuclear medicine technologist acquires gated SPECT images while the patient lies supine at rest; ECG gating is applied to correlate counts to cardiac cycle phases. The interpreting nuclear cardiologist reviews image quality, gated functional parameters (LVEF, end-diastolic and end-systolic volumes), and regional wall motion, generates a report documenting findings and clinical implications, and communicates results to the referring cardiologist for management decisions such as medical therapy adjustment or candidacy for device therapy.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when billing only the physician interpretation/report separated from the technical imaging component.
`TC`

CPT 78499: Cardiac Nuclear Medicine, Unlisted Diagnostic Procedure

CPT-78428-LEFT-TO-RIGHT-CARDIAC-SHUNT-DETECTION

CPT 78428: Left-to-Right Cardiac Shunt Detection

CPT-78481-CARDIAC-FIRST-PASS-STUDY-VENTRICULAR-FUNCTION

CPT 78481: Cardiac First-Pass Study for Ventricular Function

CPT-78473-GATED-CARDIAC-BLOOD-POOL-IMAGING-REST-AND-STRESS

CPT 78473: Gated Cardiac Blood Pool Imaging, Rest and Stress

CPT-78431-PET-MYOCARDIAL-PERFUSION-IMAGING-REST-AND-STRESS

CPT 78431: PET Myocardial Perfusion Imaging, Rest and Stress

78452-MYOCARDIAL-PERFUSION-IMAGING-TOMOGRAPHIC-SPECT-INCLUDING

CPT 78452: Myocardial Perfusion Imaging, Tomographic (SPECT)

CPT-78458-NUCLEAR-MEDICINE-BILATERAL-VENOUS-THROMBUS-IMAGING

CPT 78458: Bilateral Venous Thrombus Imaging, Nuclear Medicine

CPT-78483-FIRST-PASS-CARDIAC-FUNCTION-STUDY-REST-AND-STRESS

CPT 78483: First-Pass Cardiac Function Study, Rest and Stress

CPT-78466-PLANAR-MYOCARDIAL-NUCLEAR-IMAGING-INFARCTION-ASSESSMENT

CPT 78466: Planar Nuclear Myocardial Imaging for Infarct Localization

CPT-78429-PET-MYOCARDIAL-IMAGING-PET-CT-MYOCARDIUM-FUNCTION

CPT 78429: PET Myocardial Imaging with CT Transmission

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Taxonomy Code	Specialty	Notes
207RR0500X	Nuclear Medicine Physician	Interprets and reports gated equilibrium SPECT studies.
207RG0100X	Diagnostic Radiology	Some radiologists with nuclear medicine training interpret cardiac nuclear studies.
207RC0000X	Cardiology	Noninvasive cardiologists frequently order and may interpret cardiac imaging studies with appropriate nuclear training.
363L00000X	Nuclear Medicine Technologist	Performs radiolabeled RBC labeling and image acquisition under supervision.
208100000X	Internal Medicine	Hospitalists or internists may coordinate testing for inpatients undergoing evaluation of cardiac function.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I50.9`	Heart failure, unspecified	Common indication to quantify resting left ventricular ejection fraction via gated equilibrium SPECT.
`I25.10`	Atherosclerotic heart disease of native coronary artery without angina pectoris	Chronic ischemic heart disease prompting assessment of ventricular function at rest.
`I21.9`	Acute myocardial infarction, unspecified	Post-infarct evaluation of global and regional ventricular function.
`I46.9`	Cardiac arrest, cause unspecified	Post-resuscitation assessment of ventricular function when clinically stable.
`R07.9`	Chest pain, unspecified	Initial evaluation may include resting ventricular function assessment to stratify risk.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`78452`	Myocardial perfusion imaging, tomographic (SPECT), single study, at rest or stress	May be performed in conjunction with gated equilibrium studies to assess perfusion in addition to ventricular function.
`78451`	Myocardial perfusion imaging, planar or tomographic; first study (rest or stress)	Alternative perfusion imaging technique that can be paired or chosen instead of gated SPECT equilibrium imaging depending on protocol.
`78496`	Cardiac imaging, gated SPECT, quantitative assessment, ejection fraction and volumes (add-on) (not an official CPT; used here for context)	Quantitative gated SPECT parameters are part of the interpretation; facility may report additional quantitation codes per payer policy.
`93000`	Electrocardiogram, routine ECG with interpretation and report	Performed immediately before gated acquisition for ECG gating and rhythm documentation.
`A4641`	Radiopharmaceuticals (not a CPT; HCPCS)	The labeled red blood cells or radiopharmaceutical agent used for equilibrium radionuclide ventriculography are supplied and billed separately.

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