Americans tend to say, "in the hospital," as if there were only one.  Brits will say "in hospital."  Much as we might say, "I'm at home, rather than at the home.:

Well, all in all, I am in the hospital.  Been here since Friday. Likely going tomorrow to transitional care.

And, of course, i just want to go home at be with Tori, my tortoiseshell cat.