CPT® Code 74415

The procedure described by CPT® Code 74415 is known as urography, specifically utilizing infusion techniques such as drip or bolus, combined with nephrotomography. This imaging study is essential for visualizing the urinary tract, which includes the kidneys, ureters, bladder, and urethra. The process involves the injection of a contrast agent into a vein, which enhances the visibility of these structures on imaging studies. The primary purpose of this procedure is to assess the normal functioning of the urinary system, identify any anatomical variations or congenital anomalies, and detect obstructions or tumors within the urinary tract. To initiate the procedure, intravenous access is established, and preliminary scout films of the kidneys, ureters, and bladder (commonly referred to as KUB) may be taken to provide baseline images. The contrast material is then infused either through a bolus technique, which delivers a rapid injection for immediate opacification, or through a drip technique, which administers a continuous flow over a longer duration. The choice of technique affects the imaging process; bolus infusion results in greater renal opacification but requires more fluoroscopic images, thereby increasing radiation exposure to the patient. In contrast, the drip infusion method allows for a larger volume of contrast to be administered over time, resulting in fewer images and reduced radiation exposure. Nephrotomography, an integral part of this procedure, involves imaging the urinary system in sections to create a three-dimensional representation. This technique provides detailed insights into the anatomy and function of the kidneys and surrounding structures. After the contrast has passed through the kidneys and ureters, collecting in the bladder, the patient is asked to void. Additional imaging may be performed post-void to evaluate the function of the urethra and to confirm that the bladder has been completely emptied. It is important to note that while CPT® Code 74410 covers urography with infusion techniques, CPT® Code 74415 specifically includes the additional component of nephrotomography, enhancing the diagnostic capabilities of the procedure.