While I am not a doctor and don't play one on TV, I would think it is not an emergency/urgent situation. You will know if it becomes something you have to fix right away. If things have been going along the same for a week or so, it will most likely wait until the first available appointment. (I hate saying things like that, you have to understand, this is ONLY an opinion!)
If he starts having trouble with choking, I would certainly step into a local ER and get things moving quicker, but if he is cruising right now, you should be fine.
Is the adhesion mucous, or mucosal? That seems like the same, but truly isn't. Won't make much difference in the procedure, but might be something else to ask. (Make a list of questions as you think about them, then take the list in and get 'em answered.)
He is very lucky to have you by his side. The more you know, the more you can help!

Andrea