GI Docs/Facilities?

Hello,

I am looking for a GI doc, with a speciality in Crohn's Disease. I've tried Kelsey, but the $2,000+ for a colonoscopy with no type of financial assistance and payment plan (unless you pay half) is not possible at the moment. So anything but a doctor under Kelsey. I have United Health Care. I am on the southside of Houston, but willing to travel.