Just ran a quick search: there is only one McKenzie certified Clinic in California, and it's in Sacremento.

Here's a list of Dip and Cert therapists in California. If you go to one of their clinics, make sure you see the McKenzie therapist themself, and not just someone else who works in the clinic. http://www.mckenziemdt.org/therapist...95865E4FF21987