Kristie, the payer discretion rules can drive one batty. It's a good idea to keep a notebook of each payer's preference as some do accept (want) multiple units such as 96372(2) but I've found the best way is to utilize the 96372, 96372-59 after receiving this advice from Deborah who already has chimed in.. Yes, you may get some denials for "duplicates" (!!!), but that easily rectifiable. I usually write a note in box 19, so when calling on the "dupes", I can point to that and they'll send back for reprocessing. Yes, it's a pain, but part of the business. The art of properly applying modifiers should be a separate and comprehensive component of learning medical billing and coding IMO!!
---Suzanne E. Byrum CPC