I was diagnosed after my spine basically collapsed with fractures at 59. Pain was unbearable. The fractures are treated by an orthopedic. Pain is treated at a pain clinic. I have had 2 series of nerve ablations. The attempt to improve bone strength is treated by an endocrinologist. I am currently on Tymlos injection once daily, and vitamin D, and thyroid and I take a lot of supplements. The thing that has helped me the Most is a personal trainer who specializes in working with stroke victims to rebuild strength. EVEN THOUGH I HAVE NOT HAD A STROKE, BUILDING STRENGTH AND IMPROVING BALANCE IS ESSENTIAL. I also have found wearing a heavy duty high rise GIRDLE or pull on Post Abdominal Surgical BRACE, all ordered from AMAZON, has provided the support to stabilize my spinal column during the day. This reduces my pain level from movement.
I wish you the best, hope this helps.

I see an endocrinologist for my osteopenia and take Fosamax. I wish they could also speak about supplements but they really don’t get into that

I go to an orthopedic physician/surgeon who specializes in osteoporosis care

I was diagnosed at PC then sent to Rheumatologist for treatment.

My primary dr( internal medicine) ordered the dexascan. He prescribed Alendronate, I didn’t tolerate the medicine. So have been referred to.a Rheumatologist. It will vary which dr treats you for it. Call your insurance company and ask who will treat in and when you can get appointments.