Interventional Radiology (IR) coding involves assigning specific codes to various medical procedures performed in interventional radiology. This includes a range of minimally invasive, image-guided procedures, such as angioplasties, stent placements, and biopsies. IR coding is distinct due to its detailed, procedure-specific coding, which requires a deep understanding of complex medical procedures and the corresponding coding system, typically using Current Procedural Terminology (CPT) codes.