When I recently switched for a private practice pdoc who did therapy to a therapist and a separate pdoc, I had spent some time writing a lot about my childhood, parents, marriage, divorce, and therapy. I had emailed it to the therapist, to get him up to speed quickly.

I saved it just in case I need to make a switch again - they might not except email - but at least you can hand a print out or read it to the social worker. Get kind of a jump start on things...