CPT® Code 61798

Stereotactic radiosurgery (SRS) is a non-invasive medical procedure that utilizes advanced technology to deliver a concentrated dose of radiation to a specific area within the cranial cavity. This technique is particularly effective for treating complex cranial lesions, which may include tumors or other abnormal growths in the brain. The procedure employs various forms of radiation, including particle beams, gamma rays, or linear accelerators, to target the lesion with high precision. The term "stereotactic" refers to the use of a three-dimensional coordinate system to locate the precise position of the lesion, ensuring that the radiation is directed accurately while minimizing exposure to surrounding healthy tissue. In the context of CPT® Code 61798, the focus is on the treatment of a single, complex cranial lesion. The procedure is characterized by its ability to deliver a high radiation dose through multiple intersecting beams, which converge at the targeted lesion. This method allows for effective treatment of lesions that may be difficult to access surgically or that pose significant risks if approached through traditional surgical means. The use of a rigid stereotactic frame is essential, as it stabilizes the patient's head during the procedure, ensuring that the radiation beams are precisely aligned with the lesion. Prior to the actual treatment, a planning phase is conducted, which involves imaging techniques such as MRI or CT scans to visualize the lesion and assess its characteristics, including its location, volume, and proximity to critical structures within the brain. This meticulous planning is crucial for determining the appropriate radiation dose and minimizing potential damage to surrounding tissues.