The National Library of Medicine (NLM) is the largest medical library in the world. The NLM is located on the campus of the National Institutes of Health, in Bethesda, Md. The Library was founded in 1836 and contains nearly 12 million items in its collection.
The NLM provides scientific information services, which include compilations of more than 18 million journal citations and databases of toxic chemicals, and public information services, which include databases related to clinical trials, consumer health, senior health and potentially hazardous household products.
The NLM also serves as the American distributor of SNOMED CT (Systematized Nomenclature of Medicine - Clinical Terms), a set of clinical terminology standards designated by the federal government for the exchange of health information. In that capacity, the NLM offers a list of SNOMED CT browsers and problem lists related to the recording and encoding of clinical observations. The NLM is also involved in an effort to map SNOMED CT term lists to the ICD-10-CM standard.