The practitioners in this clinic were all certified through the reiki program offered by Now Age Wellness (www.nowagewellness,com) out of The Courtyard. The program here is more thorough and rigorous than most. The person supervising is certified by The Northwest Psychic Institute and The Sacred Stone School as well as a member of many of those professional organizations you mentioned including the International Association of Reiki Professionals and Best American Healers.
Hopefully one day there will be a national/single standard and as the field becomes mainstream that is no doubt on the way. Until then were are lucky to have highly trained practitioners whose certifications you can check here on STX.
Come out and give it a try the healing energy speaks for itself.