CPT® Code 78457

Venous thrombosis imaging, commonly referred to as a venogram, is a diagnostic procedure utilized to visualize the veins in a specific area of the body to detect the presence of blood clots. This imaging technique employs scintigraphy, which involves the use of a radiolabeled isotope tracer that is injected into the patient's circulatory system. The procedure is particularly important in identifying venous thrombosis, a condition that can arise due to various factors such as local injury to blood vessels, venous stasis (a condition where blood flow is sluggish), turbulence in blood flow, or changes in the blood's coagulation properties, known as hypercoagulopathy. During the procedure, the patient is carefully positioned on an imaging table, and a gamma camera is placed over the targeted area to be examined. An intravenous line is established to facilitate the injection of the radiolabeled isotope tracer, which allows for the visualization of blood flow within the veins. After the tracer is administered, scanning occurs at predetermined intervals to capture images as the radioisotope circulates and perfuses the designated body region. The emitted radioactive energy is then converted into detailed images that can be analyzed for the presence of thrombosis. CPT® Code 78457 specifically designates this procedure when it is performed unilaterally, meaning it focuses on one side of the body. In contrast, CPT® Code 78458 is used for bilateral venograms, which assess both sides. Following the imaging, the physician interprets the results and generates a comprehensive written report detailing the findings of the study.