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CT myelogram was performed with contrast was injected via an already existing lumbar drainage. Would we code this by using code 62284 with a -52 modifier? "Using the patient's existing lumbar drain, the side port was accessed. 15 cc of Omnipaque 180 mg contrast was administered intrathecally through the spinal needle. There was no fluoroscopically noted extravasation during the contrast injection, and the needle was removed. Multiple fluoroscopic radiographic images were obtained, after the table was tilted with the patient's head moving up and the feet down, to keep the contrast in the lumbar spine and define the inferior margin of the thecal sac."