We have a claim that denied as being included in the global period of another procedure, however this was the first surgery we had performed on this patient. When I called Cahaba I was told the claim was billed out of sequence with a subsequent procedure performed 2 weeks after the first surgery. I was told that we had to add a modifier indicating that this was related/unrelated to that global period even though the date of service was after the first procedure. I'm confused though because there were multiple procedures billed with this original surgery and they were all paid except for the primary CPT. Has anyone else had this happen? I'm very confused. Thanks for any assistance!!