Medicare and Dr. Allen

I had medicare and medicaid when i got my lapband done. and was covered. but now I've lost my medicaid. So now I am wondering, if anyone out there has medicare as their only insurance.  And if so what does a fill cost you? thank you

I was told by Dr. Rodriquez who is in the same office and also spoke with the billing office and they said medicare covers.   I start medicare Nov 1.