In this add–on procedure, the provider injects a diagnostic or therapeutic agent into a facet joint, the joint connecting two spinal vertebrae together, at the cervical or thoracic level. Or he may perform the injection for nerves innervating that joint. He uses imaging guidance of either fluoroscopy or CT scan. The provider injects the third additional level, after two initial separately reportable injections. The goal of this procedure is to treat spinal pain or to identify the exact source of pain.
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