CPT® Code 75801

The CPT® Code 75801 refers to the procedure known as lymphangiography, specifically focusing on the extremity and performed unilaterally. This procedure involves the use of radiological techniques to visualize the lymphatic system within a single limb. During lymphangiography, a physician conducts radiological supervision and interpretation, which entails overseeing the imaging process and analyzing the resulting images for diagnostic purposes. The procedure begins with the preparation of the skin, typically at the foot, where a cleansing agent is applied before the injection of a blue indicator dye. This dye is strategically injected between the toes to trace the lymphatic vessels. The physician monitors the spread of the dye, which typically takes between 15 to 30 minutes, to ensure adequate visualization of the lymphatic structures. Once the lymph vessels are well delineated, a local anesthetic is administered, followed by an incision to expose one of the larger lymph vessels. A needle or catheter is then inserted into this vessel to inject contrast media, allowing for enhanced imaging. Over the course of 1 to 2 hours, radiographs are taken to capture the flow of contrast through the lymphatic system of the leg. The physician subsequently reviews these images and provides a comprehensive written interpretation of the findings. It is important to note that for bilateral lymphangiography, a different code, CPT® 75803, should be utilized.