I have received a letter from my GI Doc. It was not a problem at all. She said that it would be best to work from home, if that was possible, do to having Crohn's and especially since I am on Humria.
My co-worker has UC and she got a letter from her GI, no problem at all either.
We see different docs at different hospitals.
If you are concerned, I would definitely contact your doc and talk to them.