I have CKD. In my view, in addition to a nephrologist, my team of doctors is made up of a endocrinogist for diabetes and thyroid, a functional doctor to look at all the moving parts of CKD including weight loss, a dietitian to assist me with the correct diet and food management, and a PCP to administer labs every 6 weeks. My nephrologist cannot handle all these secondary issues as some specialized docs can, in my opinion. In conjunction with osteoporosis, I believe Mayo offers a calcium disorders specialty group, or perhaps an endocrinologist near you may also give you more definitive answers. For me, I need to depend others for confirmation for my CKD issues. Waiting to see a nephrologist takes time, and relaying to him/her what the others have said, makes a big difference. I wish you the best to find the best answer on the direction you choose, as it is a quite difficult decision. Lastly, I would think that an orthopedic doctor could help with osteoporosis if indeed that is the case.