Summary & Overview
CPT 78459: Cardiac PET Metabolic Study
CPT code 78459 represents a cardiac positron emission tomography (PET) metabolic study used to evaluate myocardial metabolism—such as oxygen, glucose, or drug metabolism—and may include ventricular wall motion and ejection fraction assessment when performed within the same single study. This specialized diagnostic imaging code is important nationally for cardiac care pathways that require precise metabolic and functional assessment, particularly in ischemic heart disease evaluation, viability assessment, and advanced heart failure management.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for cardiac PET metabolic imaging, typical sites of service, and the common billing and coding considerations tied to single-study reporting. The publication outlines expected coverage and utilization drivers, benchmarking topics, and recent policy considerations affecting access to PET metabolic cardiac imaging. It also highlights potential areas of payer variability in prior authorization, documentation expectations, and clinical indications that influence national utilization patterns. Data not available in the input where applicable will be noted in specific sections.
Billing Code Overview
CPT code 78459 describes a positron emission tomography (PET) study of the heart performed to evaluate myocardial metabolism, including oxygen, glucose, or drug metabolism. The service may also include assessment of ventricular wall motion or ejection fraction, or both, when performed as part of the same single study.
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Service type: Diagnostic nuclear cardiology imaging (cardiac PET metabolic study)
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Typical site of service: Hospital outpatient imaging center or freestanding nuclear medicine/PET imaging facility
Clinical & Coding Specifications
Clinical Context
A typical patient is a 62-year-old male with known ischemic cardiomyopathy and an ejection fraction of 35% on echocardiography who presents with worsening exertional dyspnea and an indeterminate area of prior myocardial infarction on prior imaging. The cardiology team orders a PET myocardial metabolic study to evaluate myocardial viability and to differentiate hibernating but salvageable myocardium from scar prior to revascularization planning. The patient arrives at an outpatient nuclear medicine department or hospital radiology/nuclear medicine suite. A technologist interviews the patient, screens for contraindications, and administers the radiotracer (commonly F-18 FDG for glucose metabolism). The imaging acquisition includes gated PET to assess ventricular wall motion and ejection fraction if indicated. Images are reconstructed and reviewed by a nuclear cardiology physician or radiologist, who provides a written report with metabolic and functional findings to the referring cardiologist. Billing is submitted for 78459 for the single PET myocardial metabolic study; applicable modifiers and the appropriate diagnosis codes for ischemic heart disease or heart failure are appended per payer rules.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the interpreting physician's service separate from technical component |