CPT® Code 61799

Add-On Code

Stereotactic radiosurgery (particle beam, gamma ray, or linear accelerator); each additional cranial lesion, complex (List separately in addition to code for primary procedure)

Stereotactic radiosurgery (SRS) is a non-invasive medical procedure that utilizes advanced technology to deliver high doses of radiation precisely to targeted areas 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 ensure that the radiation is concentrated on the lesion while minimizing exposure to surrounding healthy tissue. The use of a rigid stereotactic frame is essential, as it stabilizes the patient's head in a fixed position, allowing for accurate targeting of the radiation beams. Prior to the treatment, detailed imaging studies such as three-dimensional MRI or CT scans are conducted to visualize the lesion and assess its characteristics, including its location and volume. This meticulous planning is crucial for determining the appropriate radiation dose and for evaluating the potential risks to adjacent structures. Stereotactic radiosurgery is typically performed in conjunction with a primary procedure, and the code for each additional complex cranial lesion treated is designated as CPT® Code 61799, which is reported separately in addition to the primary procedure code.