OP, have you ever worked as a Case Manager either inpatient or outpatient? Have you ever performed discharge planning, chronic/specialty planning, UR, etc.? Have your ever managed Case Managers?
Your questions are not only vague but they have led me to believe that you do not know much about Case Management. However, your posts read as if you are tasked with re-organizing a department of which you know nothing. Thus, you may need much more guidance then this forum can provide. Go off line and perform research.
Talk to your staff, your peers, and read about various models that work for your facility and what is not working. Learn more about the government policies that impact our practice. Learn your facility's role in your local area. Learn the expectations of insurance companies and their reimbursement rates. Grow your knowledge that way and you may have a better idea of how to re-organize your department.
On the other hand, another forum that may be of some help is the Nurse Management forum. Those nurses (many of them) have managed various departments forever....: Nursing Management
. Good luck!