CPT® Code 55876

Placement of interstitial device(s) for radiation therapy guidance (eg, fiducial markers, dosimeter), prostate (via needle, any approach), single or multiple

The procedure described by CPT® Code 55876 involves the placement of interstitial devices, specifically designed for radiation therapy guidance, into the prostate. These devices can include fiducial markers or dosimeters, which are critical for accurately targeting radiation treatment. The prostate is anatomically situated between the bladder and the rectum, and its position can vary based on the fullness of these adjacent structures. As the rectum becomes less distended during a course of pelvic radiotherapy, the prostate typically shifts in a posterior and inferior direction. This positional change is not easily detectable through external landmarks, making it essential to utilize interstitial devices for precise localization. The primary purpose of these devices is to mitigate the risk of target motion, which is a significant source of error in radiation treatment delivery. By placing radiopaque fiducial markers within the prostate prior to the commencement of therapy, healthcare providers can utilize X-ray imaging to monitor and ensure the accuracy of the radiation beam's isocenter before treatment delivery. The placement of these markers allows for the precise targeting of malignant tissue while minimizing radiation exposure to surrounding healthy tissues and structures. Fiducial markers, often made of gold, are implanted in or around the tumor or prostate to facilitate this process. The procedure is conducted under imaging guidance, which may include ultrasound, fluoroscopy, CT, or MRI, ensuring that the markers are accurately positioned for optimal treatment outcomes.