United States National Library of Medicine Wikipedia open wikipedia design. Entrance to the NLM United States National Library of Medicine is a medical library in Bethesda, Maryland. It is operated by the United States Federal government. It is the largest medical library in the world. References[change | change source] ↑ DeBakey ME (1991). "The National Library of Medicine. Evolution of a premier information center". JAMA. 266 (9): 1252–8. doi:10.1001/jama.266.9.1252. PMID 1870251. Other websites[change | change source] National Library of Medicine This short article about medicine can be made longer. You can help Wikipedia by adding to it. This short article about the United States can be made longer. You can help Wikipedia by adding to it. This page is based on a Wikipedia article written by contributors (read/edit).Text is available under the CC BY-SA 4.0 license; additional terms may apply. Images, videos and audio are available under their respective licenses.