This is only my opinion, but I think you should postpone this surgery. You really do need a NET specialist evaluation. I believe your fear is justified, and because NETs are not typically fast progressing tumors, you most likely have time to do some research and weigh some options. There may be support for you to get a second opinion from a NET specialist with financial assistance or some other way to work around the out of network designation. This is obviously my opinion but I also fear for you - trusting your surgery to non-NET-familiar doctors and surgeons.