LHNCBC Branches

Computer Science Branch

The Computer Science Branch (CSB) is part of the Lister Hill National Center for Biomedical Communications, a research and development division of the U.S. National Library of Medicine. CSB applies techniques of computer science and information science to problems in the representation, retrieval and manipulation of biomedical knowledge. CSB projects involve both basic and applied research.



RxTerms is a drug interface terminology derived from RxNorm for prescription writing or medication history recording (e.g. in e-prescribing systems, PHRs). The advantages of RxTerms: free to use; directly links to RxNorm, facilitating inclusion of RxNorm identifiers in electronic health records; and efficient data entry.

SNOMED CT: CORE Problem List Subset and Rule-Based Maps

SNOMED CT (Systematized Nomenclature of Medicine-Clinical Terms) is an extensive clinical terminology that was formed by the merger, expansion, and restructuring of SNOMED RT (Reference Terminology) and the United Kingdom National Health Service Clinical Terms. It is the most comprehensive clinical vocabulary available in English.