I have a case where a detethering of the spinal cord was done at C3-C5 level, likely caused by previous surgery. The only detethering code I find is 63200, but this is for lumbar. I am new to coding so I’m not sure if I can use 63200 even though it’s a different region or if this should be unlisted and use 63200 as the "comp" code? I also would use modifier -52, since the laminectomy wasn’t technically done at this surgery.