Summary & Overview
CPT 78434: PET Myocardial Perfusion Study, Rest and Pharmacologic Stress
CPT code 78434 covers PET myocardial perfusion imaging performed at both rest and stress to measure myocardial blood flow, with stress induced pharmacologically. Nationally, this imaging code is important for advanced functional cardiac evaluation, particularly in patients where quantification of myocardial blood flow influences diagnosis, risk stratification, and management of ischemic heart disease. The code is reported alongside the primary PET procedure code and is typically billed from hospital outpatient imaging centers or freestanding PET/CT facilities.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for PET myocardial perfusion, standard reporting relationships for the code (reported in conjunction with the primary PET procedure), and typical sites of service. The publication summarizes national benchmarks and payer coverage patterns where available, identifies common billing and coding considerations, and highlights recent policy and utilization trends affecting cardiac PET services. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 78434 describes a positron emission tomography (PET) myocardial perfusion study performed at both rest and stress to quantify myocardial blood flow. Stress is pharmacologically induced by injection of a drug, and the study is reported in conjunction with a code for the primary PET procedure.
Service type: Cardiac PET imaging — rest and stress myocardial perfusion with pharmacologic stress
Typical site of service: Hospital outpatient imaging center or freestanding PET/CT imaging facility
Clinical & Coding Specifications
Clinical Context
A 64-year-old patient with known ischemic heart disease and worsening exertional chest pain is referred for a pharmacologic stress myocardial perfusion PET study to quantify myocardial blood flow at rest and during stress. The nuclear medicine team reviews recent clinical history, medication list, and contraindications to vasodilator agents. On the day of service the patient arrives to the outpatient imaging center (or hospital nuclear medicine department), IV access is obtained, baseline vitals are recorded, and a PET radiopharmaceutical is administered at rest with image acquisition. A vasodilator agent (such as regadenoson or dipyridamole) is administered to induce stress, followed by a second PET radiotracer injection and stress image acquisition. The interpreting nuclear cardiologist performs image interpretation, calculates myocardial blood flow and flow reserve, documents findings and impression, and communicates actionable results to the referring cardiologist. Billing uses 78434 reported with the primary PET imaging/procedure code for myocardial perfusion imaging and may include facility and professional component reporting as appropriate.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation for the PET study. |