Generally speaking employers have to make reasonable accomodations for someone with a disability. That could involve a special chair for a bad back, free access to the restroom for crohns, a later start of the work day, etc. However, if you can't think of a way your employer could reasonably accomodate you in your position than they may not be required to help you. I think it is up to them whether or not they allow you to move to a different position in the company. I am not sure that they would be required to do so. However, you could argue that you need less stress and that if there is another open position for which you are qualified, moving you there would be a reasonable accomodation. Typically though accommodations are to keep you in your current job.
26 Year old married female. Diagnosed w/ CD 3 years ago, IBS for over 10 years before that, which was probably the CD. Currently on Pentasa 4 pills/4x day, hysociamine prn, nexium, and ortho evra. Good times!!!