I'm really not one to put my business on the www, but I received an unexpected bill this morning for some surgery I had in July 2020. I haven't been able to dig into yet as to why my insurance isn't paying the portion they should have, but what are my options for fighting this? I've never really been in this situation so I'm trying to explore all avenues since I believe my insurance is in the wrong here. I've been expecting a bill in the 3-5K range, but got hit with just over a 13k bill.