There are two doctors in Northern California you will find mentioned, Avery in SF and Lee at Stanford. I've had consultations with both. I'd get an opinion with at least one, if not both. The more opinions you have the better you can make a comfortable decision.

I've researched TOS a lot over the past years and I would travel to see who I felt was the most competent and conservative. There seems to be a growing interest in Dr. Donahue in Boston and that's who I narrowed down on years ago if I ever blew a clot. Not a "little bit" of travel though for us.