When George Wendt's character is speaking to Matt Keeslar's character in the ER waiting room, there are a couple of pages for "Dr. Howard, Dr. Fine". This is a nod to the Three Stooges' short Men in Black (1934), which paged the Stooges with calls of "Dr. Howard, Dr. Fine, Dr. Howard".
The hospital was actually a set built in the high school where Harold looks for a "big sister".