CPT® Code 77520

The CPT® Code 77520 refers to the procedure of proton treatment delivery, specifically categorized as a simple procedure without compensation. In this context, proton therapy is a form of radiation treatment that utilizes protons, which are positively charged particles, to target and destroy cancerous cells. The primary advantage of using proton beams lies in their ability to deliver high doses of radiation directly to the tumor while minimizing exposure to surrounding healthy tissues. This precision is particularly beneficial for tumors that are situated deep within the body or in close proximity to critical structures. During this procedure, the physician directs the proton beam at a specific treatment area using a single non-tangential or oblique port, along with a custom block designed to shape the radiation field. It is important to note that if a custom-made device is employed to enhance the control of the radiation dose, the appropriate code to use would be CPT® Code 77522. This distinction is crucial for accurate medical coding and billing practices.