Ask Dr. Z

"Patient's clinical history and appropriate imaging was reviewed. Patient is status post lumbosacral fusion. She has responded well to previous left iliac screw injections for her left-sided low back pain and gluteal region pain. Her last injection was completed in June 2019. She presents today with recurrence of her pain for maintenance injection. Using usual sterile technique, fluoroscopic guidance, and local anesthesia, a 3.5 inch, 25 gauge spinal needle was advanced to the posterior aspect of the trigger point. With final needle tip position, a small amount of diluted iodinated contrast confirmed its location. Transient vascular uptake was observed and could be cleared with final needle position. 1 cc of 2:1 mixture of anesthetic: steroid was administered at this location. The needle was withdrawn, restyletted, and removed. The patient experienced no complication." How would I code this? With an unlisted 64999 CPT code or the actual 20552 CPT code with 77002?