HCPCS 77778

Complex interstitial radiation source application

AI EXPLANATION: Complex interstitial brachytherapy is a specialized form of internal radiation treatment. During this procedure, tiny radioactive sources—such as seeds, ribbons, or capsules—are inserted directly into or immediately surrounding abnormal tissue or a tumor. Clinicians place delicate tubes, needles, or catheters to deliver targeted radiation right where it is needed while minimizing radiation exposure to nearby healthy tissue.