I don't know what the particulars are with that organization. My therapist is a listed member, but she was not always listed, so it may be possible that there are certified therapists in your state who don't belong to that organization, or for some reason aren't listed. ($?)

You might try phone directories, Google: myofascial trigger point therapist [your state] and ask the physiatrist who mentioned it (she may know one, or have her staff find one for you).

Doc