I have a question on what modifier would be best to use in this scenario. Patient came in for an I&D and was to return back in a week for stitch removal. Patient didn't have the stitches removal but returned back to the office because the abscess grew in size and visit required another I&D. Would modifer 58 be used since its "more extensive to the first procedure", or modifer 78 since it was unplanned (but no operating room was used) ? thanks for any input.