John, Call Dr Allan Weiss's office, ask the receptionist who they use for thymectomy. They are located in St. Pete Beach.
The other and best option is michael mack in Dallas. but would recommend having the surgery at UTSW and not the other hospital he works at. UTSW has a whole team of neuros who spec in MG and can get you back in shape if things go wrong, unlike the OTHER hospital there. sigh. But Mack is pretty decent and does the VATS (3 small slits in the R flank toward back. One day in, one day out. Unless you have an issue and end up in the hands of incompetence as I did at that other hospital. And United healthcare used to have UTSW and Mack on the list of approved. So shouldn't be an issue there!
God bless
deb