I have 2 credentials from ARDMS and after taking exam with CCI it is my feeling that CCI is the true not for profit organization.And if you are talking about validity I konw several people they have ARDMS credential and they can not even scan why you have to take two exams with ARDMS all this is just money thing My hospital is getting Accredetation based on my credential and I dont think that I know less then any body . I am an intructor at George Washington University Your credential dose not preove any thing it is you who has to know what you are doing you can earn these credentials only by taking Edelman's courses . naveed