Biomedical & Health Informatics - discipline devoted to the efficient storage, acquisition, and use of information in health care
Clinical Informatics - area within the discipline of informatics that is focused on health care delivery
Informatics is more about using technology to help people perform their work better than it is about building systems to mimic or replace human expertise.
Informatics is information science applied in a biomedical application domain with the aim of helping people, not just any use of IT in health care.
The focus is on information and the larger goal is the benefit that information provides to health care and the optimal health of individuals and populations.