http://pathology.jhu.edu/department/services/secondopinion.cfmI sent my urologist a note requesting that the slides be sent per the above link. They said fine and would request hospital pathology take care of it. I got a call the next day from the hospital asking where to send it. I then gave them the link above and they said, no problem, they do it all the time.
I suggest starting with your urologist then working backward to whoever has your slides if they give you any trouble. You can do it all yourself but a lot easier if it is one pathology group sending to another as you will see when you read the instructions. JH billed my Medicare who paid it and I never saw a bill directly. No one charged me to do anything.
Most importantly, try to think about
this rationally as you are in pretty good shape from a diagnostic standpoint and have plenty of time to think this through. I think you find a solution that meets your requirements.