Your visit to Mayo Clinic in Arizona sounds disappointing to say the least. I'm really sorry to hear that that was your experience. Let's see if we can't problem solve this with some ideas from Connect members and seeking the proper channels within Mayo. I'm tagging a variety of fellow Connect members to hear their thoughts about coordinating care at Mayo Clinic, like @danab@windwalker@waynen and @jenniferhunter (who has also had extensive spinal surgeries).
First, I encourage you to submit your situation to the Office of Patient Experience by email or phone and tell them everything you've written here. They don't answer medical questions, but will certainly address your disappointment of not getting the full Mayo experience and team approach you were expecting. The team approach is the hallmark of Mayo Clinic. Here's the contact information https://www.mayoclinic.org/about-mayo-clinic/patient-experience
Secondly, could you request that the endocrinologist suggest a referral to another department, like Internal Medicine or Rheumatology? You should be able to make this request through the patient portal. Ask the endocrinologist who you should see next. If you're not to see her or endocrinology to continue the investigation of your issues, who should you see next? That is a reasonable and expected question to ask. Are you still in Scottsdale now?