Summary & Overview
CPT 78483: First-Pass Cardiac Function Study, Rest and Stress
CPT code 78483 denotes a first-pass radionuclide cardiac study used to measure ventricular function at rest and under stress. This diagnostic nuclear cardiology procedure quantifies how effectively the heart ejects blood during the initial transit of a radiotracer, providing objective measures of cardiac pumping performance. Nationally, this code matters for evaluation of patients with suspected or known ischemic heart disease, heart failure, or perioperative cardiac assessment where dynamic functional information is required.
Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for first-pass ventricular studies, typical sites of service, and common billing considerations tied to the procedure. The publication outlines national benchmarks where available, notes relevant coding and coverage themes, and summarizes policy trends that affect utilization and reimbursement for nuclear cardiac imaging.
This report is written for clinicians, hospital billing teams, and policy analysts seeking a national perspective on the clinical role and payer landscape for CPT code 78483. It highlights what organizations typically review when authorizing and paying for first-pass cardiac function studies and provides the operational context needed to align clinical services with payer expectations.
Billing Code Overview
CPT code 78483 describes a first-pass radionuclide cardiac study performed to assess cardiac function at rest and during stress. The procedure involves multiple imaging sequences that evaluate how effectively the heart pumps blood to the body by tracking the initial transit (first pass) of a radiotracer through the cardiac chambers.
Service Type: Cardiac nuclear imaging / first-pass ventriculography
Typical Site of Service: Hospital outpatient imaging department or outpatient nuclear cardiology laboratory
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with exertional chest pain and a history of coronary artery disease is referred for a radionuclide first-pass ventriculography to assess left and right ventricular function at rest and with pharmacologic stress. The patient arrives to an outpatient nuclear medicine or hospital imaging department after pre-procedure screening, IV placement, and review of anticoagulation and contrast history. A technologist prepares the radiopharmaceutical and positions the patient under a gamma camera. The cardiologist or nuclear medicine physician directs and interprets imaging. The procedure includes injection of a radiotracer and acquisition of first-pass images during rest and during an exercise or pharmacologic stress protocol to assess ventricular ejection fraction, wall motion, and cardiac output. Results are documented in the imaging report and communicated to the referring cardiologist for management decisions such as revascularization planning or medical therapy adjustment.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation separate from technical services |
TC | Technical component |