William Stuppy is a competent Gastroenterologist who gravitates heavily towards gut parasites & bacteria as being the main origin of many/most GI problems. This can indeed be the cause, that many 'more-traditional' GI docs miss, and if that's the case for you, he may be the best GI doc for you. However, if it's something else, beware. He totally mis-diagnosed my malady, neglected to order the most obvious test, then refused to return any of my calls. Not professional.