Radiology encompasses Diagnostic Radiology and Interventional Radiology. Diagnostic Radiology involves imaging techniques such as X-ray, Ultrasound, CT, MRI, and MRA to visualize physical anatomy. Interventional Radiology focuses on performing vascular surgery with radiological guidance. Coding for Diagnostic Radiology is determined by the number of views and specific anatomy per CPT description. In Interventional Radiology, coding is based on the hierarchy of arteries and veins, as well as the hierarchy of surgical procedures within them.