The show is supposed to take place in Tree Hill, but the location on the hospital clearly states New Brunswick County, which is the real filming location of the fictional town of "Tree Hill".
When Lucas is sitting in the hallway of the hospital, the elevator door opens and Haley, Nathan and Deb walk out of it and see him. While they are talking, it is very obvious that they are on the first floor because you can see the number 1 on the elevator behind them. They would not be coming down from a higher floor to see Lucas if they had just gotten there.