What do we finally find out about where holden is while he is telling the story?

There is this sentence that Holden says that helps us find out about his exact location in the story:
“This one psychoanalyst guy they have here, keeps asking me if I’m going to apply myself when I go back to school next September.”
Based on this sentence, we can conclude that Holden is in a psychiatric hospital, where his mental state is being estimated.