The thing to remember is that scripts for TV and film aren't (primarily) a method of telling the story. What they are is an instruction manual for how to produce something which will tell the story.
This means that divisions which are almost meaningless in some other format (such as a novel) will be very meaningful in a TV script. Moving between rooms usually means moving between sets. Even if it doesn't, it will almost certainly mean a lot of moving around of lighting and other equipment. This means there are good practical reasons for diving up scenes by room.
If a scene alternates between two rooms, for example, it would be easy to spot that it is broken down into several parts, with alternating locations. Since such scenes would normally be filmed one room (i.e. set) at a time (and thus out of sequence, according to the story), combining them into a single scene in the interests of story flow is problematic when it comes to actually filming and capturing that flow.
So, yes, in your case I would probably break it down into two scenes. Bear in mind, though, that if a significant amount of action takes place in the doorway, there's a chance that a seperate set (or setup, at least) might be used for this (since, if the room and the hallway are seperate sets, there may be no actual doorway which links them), in which case you might want to break the sequence into three parts.