Hi Teresa: I know the GA68 is available at Mayo, but unless they've changed their policy, please be aware that if you go there you may have to pay an additional fee. I talked to them before I went to Moffitt for my scan and they will tell you that they accept assignment, but that's not entirely true. They do accept assignment from Medicare, as far as what Medicare will pay them, but they do not accept assignment from Medicare for the entire fee. You are left with the balance. This happened to my mother-in-law when we took here there for some sort of scan. She was left with a residual bill. Unfortunately, we didn't understand their protocol and we were left with a hefty bill. Just wanted to make all aware of this. Be very careful if you go to Mayo that you completely understand their policy. It's a little confusing. Hope this will help to clear up some misconceptions regarding Medicare and Mayo.