Can a practitioner bill 2 Emergency Dept visits on the same date? MUE edits state 1 unit per day. MUE editis for a facility, however, show a max of 2 units. Are all services from both visits combined? You can't really assign a higher level Emergency Dept code if the key components aren't there. There is no time factor in the ED visit descriptions. Can a modifier be added to indicate both were medically necessary? Example: Pt was seen early in the day for depression. Later in the evening, same pt. presents to ER with broken hand.