The National Institute of Mental Health (NIMH) is one of 27 institutes and centers that make up the National Institutes of Health (NIH). The NIH in turn is an agency of the United States Department of Health and Human Services and is the primary agency of the United States government responsible for biomedical and health-related research.NIMH is the largest research organization in the world specializing in mental illness. Thomas R. Insel is the current Director of NIMH.
