My trick is to learn the terminology/jargon of the specialists by buying meds students used textbooks. It completely changes the conversation dynamics even if initially it appears to slightly confuse them.

Sometimes it angers them but then it's a clear signal that you must see someone else ASAP. When we grilled my wife first oncologist on his protocol, he broke down and said that he was not up to date on the latest research. We requested someone else, he was a much better fit and most importantly she is still alive, her metastasis disappeared and the latest scans and bloodworks results are still NED (no evidence of disease).