<prompt> Human: Am I ultimately responsible for this bill even though I took the proper steps to ensure my lab was used? Who should I contact first regarding this matter, my insurance or my doctor?EDIT: thank you all so much for the helpful advice, this has truly been such a burden on me as Im in graduate school scraping by at the moment. So, I called my doctor and mentioned that they check my instructions to send my sample to quest diagnostics my in-network lab. They said that quest couldnt perform the required tests so they sent it to a lab in NEW JERSEY my preferred lab is 5 minutes down the road in Florida. I called quest to verify that they couldnt do the tests and found out that they could do 7 out of the 8 tests. Btw, this visit was to test for a basic yeast infection, nothing crazy. I called the doctors office back and told them that I would have never approved of an out of network lab to be used and that they should have told me. The receptionist said she is going to talk to her supervisor and call me back. Yeah, well see.  <response>: Who should I contact first regarding this matter, my insurance or my doctor?If you have a copy of whatever you sent to your doctors office I would go straight to the insurance company. I would call them first, explain the situation, and ask where you can send the required documentation for them to work out. 