First of all, credentials (licensing, certifications, etc.). Then I start asking my friends to see if they have heard of the place or the people for any reviews. I also pay attention to what they are advertising. If they are listing everything under the sun as far as techniques that they offer, then they probably have not mastered any one thing. I also ask other healthcare providers: chiropractors, nurses, dentists, physical therapists, athletic trainers, even hair stylists to see if they have any recommendations. It may take a little trial and error. If you go for the cheapest price, then that is what you will probably receive. If you choose the highest price, then you are paying for extra you probably don't need. Look for a decent average price. I have found some of the best service comes from those who charge the market average, without over-advertising. Their reputation usually precedes them. If you hear a name 2 or 3 times from different sources, then it is a pretty good bet. Best wishes...