Summary & Overview
CPT 78432: PET Myocardial Perfusion and Metabolic Viability Study
CPT code 78432 designates a dual-tracer PET myocardial imaging study that concurrently evaluates myocardial perfusion and metabolic activity to assess blood flow, metabolism (oxygen, glucose, or drug metabolism), and myocardial viability. This hybrid functional study can also include measurement of ejection fraction and ventricular wall motion when performed. The code matters nationally because PET myocardial imaging contributes to diagnosis and management of ischemic heart disease, viability assessment prior to revascularization, and complex heart failure evaluation, with implications for imaging capacity, payer coverage, and clinical pathways.
Key payers referenced include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for dual-tracer PET myocardial studies, payment and coverage considerations across major national payers, and benchmarking materials where available. The publication outlines common service settings, expected clinical indications, and typical components of the study that affect coding and billing. Data not available in the input for Associated Taxonomies, ICD-10 diagnoses, and related codes are noted as such. This summary is intended to inform coding, administrative planning, and payer engagement at a national level.
Billing Code Overview
CPT code 78432 describes a positron emission tomography (PET) myocardial imaging study using two radionuclide tracers. The procedure combines assessment of myocardial perfusion (blood flow to and from the heart) with metabolic imaging that can evaluate oxygen, glucose, or drug metabolism and determine myocardial viability. The description notes that ejection fraction and ventricular wall motion studies are included when performed.
Service Type: Nuclear cardiology diagnostic imaging (dual-tracer PET myocardial perfusion and metabolic viability study)
Typical Site of Service: Hospital outpatient departments, cardiac imaging centers, and PET-capable ambulatory imaging centers
Data not available in the input for Associated Taxonomies, ICD-10 Diagnoses, or Related Codes.
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with a history of ischemic cardiomyopathy and prior percutaneous coronary intervention presents with progressive exertional dyspnea and equivocal findings on prior stress testing. The cardiologist orders a PET myocardial perfusion and metabolic viability study to assess myocardial blood flow, identify hibernating myocardium, and evaluate left ventricular ejection fraction and wall motion. The patient arrives at an outpatient nuclear cardiology or hospital imaging department.
The clinical workflow: the patient is screened for contraindications to PET tracers and venous access is obtained. A perfusion tracer is administered first, with gated PET acquisition for perfusion and left ventricular function. After an appropriate interval, a metabolic tracer (commonly FDG) is administered and imaging is performed to evaluate myocardial metabolism and viability. Images are processed to produce perfusion and metabolic fused datasets. A nuclear medicine physician or cardiologist with PET expertise interprets perfusion defects, matched or mismatched metabolism, ejection fraction, and wall motion data, then documents findings and issues a formal report for the referring cardiologist for treatment planning (medical therapy vs revascularization). Typical sites of service include outpatient imaging centers, hospital outpatient departments, and inpatient settings when clinically indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component |