My doc is a medical doctor who specializes in candida and hormonal imbalances. He is from a clinic in Houston, TX called Hotze Wellness Center. They see people from all over the country.
As far as testing goes, I did have a blood test that confirmed the yeast, but they go a lot simply on what your symptoms are, how you look in person, exam your nails, toes, etc. I was a textbook case of having yeast, but it wasn't a stretch. It is obvious I have it. Hope this helps.