NEW YORK (AP) _ Peter Berg says he is leaving the series ``Chicago Hope'' to concentrate on writing and directing, not because he's tired of acting in the doctor drama.

``It's not like I'm David Caruso, like `I hate you, let me out,''' Berg said in TV Guide's Nov. 28 edition, referring to the former star of ``NYPD Blue.''

``It's just that at some point you forget what episode you're in, and what you develop a passion for is the big fat paycheck. I don't want that to be my passion right now.''

And don't ask Berg, 34, about his rumored romance with Madonna. ``I'm not interested in talking about that,'' he said.