I understand there are several in the Portland area. You might try Project Quest, see if the Naturopath is Wa certified. I've been there for hypnosis, but I'm not sure about mmj, but they see AIDS patients and work with end stage patients, so you might qualify. I had to have a phone interview by the therapist before I was allowed an appointment, but I was allowed like courtesy as well. Not so great part of town, but nice environment inside. Something tells me an MS patient would have luck there.