Re: Doctor for back pain in Zurich
If your profile is correct and you're (still) in the Zurich area, then there's quite a few options.
In addition to the aforementioned Hirslanden Klinik, there is Schulthess Klinik which has an Ortho, Neuro, Pain Management and Therapy clinics. Lots of the consultants there speak exceptional English.
Not far from that is the Balgrist University Hospital with an Orthopaedic clinic with English speaking spine specialists.
I'm certainly not medically qualified at all, so as Ace1 suggests, maybe your first port of call would be your GP, who can refer you on. I think you have an abundance of consultants here in CH, particularly in/near the ZH area.