How do I find out who are the social workers and contact information for hospitals in Atlanta area?

I'm not sure what you're asking but I would start with Family and Children Services.. the Headquarters. You can look them up on google

All hospitals do have social workers on site contact the hospital main number and ask to be connected the social worker on site.

Social workers and discharge planners like those that work with patients being discharged but need continued care.

I think Carmelea's advice is a good place to start.