Not necessarily. Look at how fast things changed for stomach ulcers. They were supposedly the archetypal stress caused psycho-somatic disorder. Well, that didn't last long once they realised they could cure it easily, quickly, and permanently with basic antibiotics.
If the new DSM pans out the way it looks like it's going to - the psychs are going to claim psychogenic by default for any uncertainty in diagnosis in any organic illness. : (