Summary & Overview
CPT 78473: Gated Cardiac Blood Pool Imaging, Rest and Stress
CPT code 78473 represents gated equilibrium cardiac blood pool imaging performed at rest and stress with wall motion analysis and ejection fraction measurement. This nuclear cardiology procedure quantifies ventricular function and regional wall motion to assess cardiac pumping performance, which contributes to diagnosis and management of ischemic heart disease, cardiomyopathy, and pre/post-intervention evaluation. Nationally, accurate coding and interpretation of 78473 affect utilization patterns for advanced cardiac imaging and influence clinical decision pathways for patients with suspected or known cardiac dysfunction.
Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise national overview of clinical context for 78473, a summary of payer coverage landscape, typical sites of service, common modifiers (provided separately), and the types of benchmarks and policy factors that influence billing and utilization. The publication highlights what to expect regarding where the service is performed and why the test is ordered, offering insights into reimbursement relevance, coding nuances, and operational considerations for facilities providing nuclear cardiology imaging.
Data not available in the input for associated taxonomies, specific ICD-10 diagnoses, related codes, and payer-specific coverage policies.
Billing Code Overview
CPT code 78473 describes gated equilibrium cardiac blood pool imaging at rest and stress with wall motion study and ejection fraction assessment. The procedure evaluates how the heart is pumping blood to the rest of the body by measuring ventricular function and regional wall motion during rest and physiologic or pharmacologic stress.
Service Type: Nuclear cardiology imaging with gated blood pool (radionuclide) study, rest and stress, including ejection fraction and wall motion analysis
Typical Site of Service: Hospital outpatient imaging center, outpatient radiology/nuclear medicine department, or freestanding imaging facility
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with known ischemic cardiomyopathy and exertional dyspnea is referred for gated equilibrium radionuclide ventriculography at rest and pharmacologic stress to assess left ventricular ejection fraction and regional wall motion. The patient arrives at an outpatient nuclear medicine or hospital imaging department. An IV line is established for technetium-labeled radiopharmaceutical administration; baseline gated images are acquired at rest. A standardized exercise or pharmacologic stress protocol (dobutamine or adenosine when exercise is not feasible) is performed, with repeat gated equilibrium imaging during peak stress and immediate post-stress to evaluate inducible wall motion abnormalities and calculate stress ejection fraction. Images are processed and interpreted by a cardiologist or nuclear medicine physician, with a formal report documenting resting and stress ejection fractions, qualitative and quantitative wall motion assessment, and comparison to prior studies when available. The study supports clinical decisions about ischemia, viability, heart failure management, and need for revascularization.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting only the physician interpretation separate from the technical component |
TC |