@paxmundi , ask for the doctor's office manager & head of billing if they accept MEDICARE part B with a part G supplement. That's the best you can get right now.
Info: My friend has Blue cross plan F supplement & she said you can NO longer buy plan F, she is "grandfathered" into her plan. So,I got a Medicare supplement plan *G last January, that means I can see any provider who accepts medicare , and I only have a $257 deductible for the entire year. I have Mutual of Omaha G supplement. I am in Dallas, and my cost was $138 per month, but that varies by zip code & state & goes up with age. I am almost 68 years old.
Good luck to you.