I thought Reclast or, to a lesser extent, an oral bisphosphonate, were the best follow-up drugs after Prolia, and the timing needs to be individualized using the CTX blood test. Can you ask your PCP to order them and consult with another doctor or with Keith McCormick? I have also read that Tymlos isn't useful after Prolia. I would get a second opinion if you can.

Many excellent endo docs don't do those tests so that alone isn't a reason to change. I would be more concerned with the follow-up options you might have. I am getting a second opinion that does use the CTX though!