Dr. Cox is very professional and pleasant. My only problem is that his practice is no longer located in Penn Valley, which was a satellite office which has now been closed. The office is now in Yuba City, which is a bit of a drive for me from Nevada City. Also, the practice is now part of Sutter Medical Foundation, so the pricing on many of the procedures seems very steep to me, with my high deductible insurance plan, but maybe that is just what dermatologists charge now. I don't actually know.