I am a part of the American Association of Managed Care Nurses (aamcn.org), and they offer the CMCN (Certified Managed Care Nurse) prep course for certification which covers quality & utilization...
I can't testify to the "best" case management certification, but CCM is one of the most widely recognized. I am a part of the American Association of Managed Care Nurses (aamcn.org), and they offer...