Does Medicaid limit size of space in nursing home rooms?

I don't know how to word this question. My Dad is on Medicaid in a nursing home in Indiana. His "half" of the room is smaller than his roommate's. The nurse told us there is an empty bed in another room with a larger pat of the room. (Rooms here are not divided equally, some patients have more space in a room than their roommate) I asked the social worker if he could be moved to that room and she used some terminology that sounded like he had to take a smaller space in a room because of Medicaid but she would look into it. Do Medicaid residents have to take the smaller space if a room is divided unevenly? I'll find out in a day or so but really want to know now and can't find this info on the internet.