National Center for Complementary and Integrative Health (NCCIH)The National Center for Complementary and Integrative Health (NCCIH) is the Federal Government’s lead agency for scientific research on complementary and integrative health approaches. We are 1 of the 27 Institutes, Centers, and Offices that make up the National Institutes of Health (NIH) within the U.S. Department of Health and Human Services. The mission of NCCIH is to determine, through rigorous scientific investigation, the fundamental science, usefulness, and safety of complementary and integrative health approaches and their roles in improving health and health care. NCCIH’s vision is that scientific evidence informs decision making by the public, health care professionals, and health policymakers regarding the integrated use of complementary health approaches in a whole person health framework.