The LHNCBC Medical Terminology Standards  project seeks to facilitate the development, promotion, and dissemination of health data standards, as well as to support the use of terminology standards in health care, public health, and research. The Project focuses on the integration, dissemination, quality assurance and applications of drug ontologies and on quality assurance in biomedical ontologies. We also develop application programming interfaces (APIs) and browsers for RxNorm and related drug resources.