2025 CPT code 63621
(unknown) Effective Date: N/A Surgery - Surgical Procedures on the Nervous System Surgery Feed
Stereotactic radiosurgery (particle beam, gamma ray, or linear accelerator); each additional spinal lesion (List separately in addition to code for primary procedure)
Modifiers may be applicable to this code to indicate specific circumstances of the procedure. Consult modifier guidelines for details.
Medical necessity for this procedure is established by the diagnosis of a spinal lesion amenable to stereotactic radiosurgery, such as a tumor or arteriovenous malformation that affects neural tissue or is adjacent to the dura mater, and supporting documentation justifying the treatment approach.
The surgeon performs the stereotactic radiosurgery, including patient preparation, target localization using imaging guidance, radiation delivery using specialized equipment, and post-procedure care. The surgeon is responsible for all aspects of planning, dosimetry, targeting, positioning and blocking.
In simple words: This procedure involves using precisely focused radiation to eliminate additional abnormal areas in the spine during the same session as the first one. It is a non-surgical technique that does not require incisions and is used to treat conditions like tumors or malformations affecting the spinal cord or its surrounding tissues.
This add-on code describes the destruction of additional spinal lesions using stereotactic radiosurgery during the same session as the initial lesion's destruction. This technique utilizes highly focused radiation beams (particle beam, gamma ray, or linear accelerator) to target the lesion without surgical incision. It involves computer-assisted planning, imaging guidance, and precise radiation delivery.It is reported in addition to the primary procedure code (63620) and is limited to a maximum of two times per course of treatment, regardless of the number of lesions treated.
Example 1: A patient with two spinal tumors close to each other undergoes stereotactic radiosurgery. Code 63620 is reported for the treatment of the first tumor, and 63621 is reported for the treatment of the second tumor in the same operative session., A patient with a spinal arteriovenous malformation (AVM) abutting the dura mater and a separate spinal metastasis is treated with stereotactic radiosurgery in a single session. 63620 is reported for treating the AVM and 63621 is reported for treating the metastasis., A patient with three small spinal tumors undergoes stereotactic radiosurgery. The first tumor is treated and reported with 63620. The second tumor is reported with 63621. Although there is a third tumor, only two instances of 63621 can be billed per course of treatment.
Documentation must include details of the primary procedure, number and location of additional lesions treated, imaging studies used for targeting, treatment planning details (including dose and fractionation if applicable), and any intraoperative complications.
** Code 63621 should not be reported in conjunction with intensity-modulated beam delivery plan and treatment codes (77301, 77385, 77386) or stereotactic body radiation therapy codes (77373, 77435).
- Revenue Code: P1G
- Payment Status: unknown
- Specialties:Neurosurgery, Radiation Oncology
- Place of Service:Ambulatory Surgical Center, Hospital Outpatient, Freestanding Clinic