I checked a bit, couldn't find anything in Grand Rapids other than doctor practises. Is Ann Arbor far? Even if it means a couple of hours on a train, it will be worth your while to see the right GI:
Gastroenterology at Taubman Center
1500 E. Medical Center DriveFloor 3, Reception D
Ann ArborMI48109
888-229-7408
If traveling a little is really not possible, call them anyway, ask to speak with a GI, get this GI on the phone and describe your situation so this doctor can recommend someone closer. Also check this link because U Mich has IBD clinics in different
locations:
http://www.med.umich.edu/ibd/faculty/locations.html
Post Edited (B'Dereh) : 1/5/2013 11:55:32 AM (GMT-7)