CPT® Code 78458

Venous thrombosis imaging, commonly referred to as a venogram, is a diagnostic procedure utilized to visualize the veins and assess for the presence of blood clots (thrombosis) within the venous system. This imaging technique employs scintigraphy, which is a method that uses a radiolabeled isotope tracer to create images of the blood vessels. The occurrence of venous thrombosis can be attributed to various factors, including 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, components such as red blood cells (RBCs), platelets, fibrinogen, and monoclonal antibodies can be labeled with a radioactive isotope to enhance the imaging of thrombosis. The patient is positioned on an imaging table, and a gamma camera is placed over the area of interest. An intravenous line is established to facilitate the injection of the radiolabeled tracer directly into the bloodstream. Following the injection, scanning is conducted at predetermined intervals to allow the radioisotope to circulate and perfuse the targeted body regions. The emitted radioactive energy is then captured and converted into detailed images, which are crucial for diagnosing venous thrombosis. For unilateral venous imaging, CPT® code 78457 is applicable, while CPT® code 78458 is designated for bilateral venous imaging. The physician is responsible for interpreting the results of the study and providing a comprehensive written report detailing the findings.