Dr. Corey Siegel heads up the inflammatory bowel disease center at Dartmouth Hitchcock. He speaks at IBD conferences, so he seems to be on top of the latest research. He seems to subscribe to the school of thought favoring the strongest meds, first.
He appears to be very caring and intelligent -- of course, no doc is perfect, but my daughter likes him. He is great at using email to communicate, and we have found him to be very responsive.
I believe one of his mentors, Dr. Richard Rothstein, heads up gastroenterology at Dartmouth Hitchcock. We thought he was great. He did my daughter's colonoscopy, and I loved how he said, "We don't treat THIS (pointing at the pics), we treat the PATIENT."