My doc at Mayo has commented that about 14% of patients on Hormone Deprivation Therapy may experience very low PSA levels while simultaneously having rapidly advancing PC. For this reason, sensitive scans must also be used to confirm the status of the disease.
(This talk is on a video by Dr. Kwon which we found through the Prostate Cancer Research Institute, a very help organization. They may also be helpful.)

Hi Sam,
I’m wondering if there was a miscommunication with Mayo about them accepting you as a patient with Medicare as your only insurance.
Not necessarily the same, but I had a 2019 biopsy at Mayo and Jan/Feb 2020 PBT (Proton Beam Treatment) at Mayo. My primary coverage was Medicare and my secondary a policy from my wife’s retirement (good coverage). That said, our secondary starts at 80% of the 20% that Medicare doesn’t cover. I had tiny bills related to my treatment.
Don’t know if it might be the type of treatment would make a difference. Not long ago many insurers were not covering PSMA/PET scans and its my casual impression that now most insurers cover the PSMA/PET scans.
I wouldn’t stop with the first “No”.
Good Luck

I was just on the phone with Mayo Clinic. They tell me since I haven’t been there in three years they consider me new patient and denied my doctors referral. Mayo clinic Rochester remove my prostate 2018 now on my fifth year PSA number is that 0.2 I need to find a urologist.