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Interlibrary Loan and Document Delivery Services

The National Library of Medicine (NLM) has one of the largest collections of biomedical literature in the world. NLM's interlibrary loan (ILL) and document delivery services make these resources available to U.S. and international libraries as part of NLM's mission to collect, preserve, and disseminate biomedical information.

Annually, the Library responds to more than 150,000 requests, averaging over 700 requests daily for articles, books, audiovisuals and microform materials. NLM is the library of last resort for biomedical materials that are not available from local or regional libraries. For more information on the national network of medical libraries and health information centers coordinated by NLM see National Network of Libraries of Medicine® (NNLM).

Submitting Interlibrary Loan Requests to NLM

Libraries are encouraged to submit interlibrary loan (ILL) requests through DOCLINE, NLM’s request routing and referral system.  For information about joining DOCLINE, please refer to the eligibility guidelines or contact your DOCLINE Coordinator.

Libraries that are not DOCLINE members and that have established an interlibrary loan account with NLM must submit their requests through our web portal using their LIBID and password. All interlibrary loan requests submitted through the portal must include complete citation information including NLM Unique ID from Locatorplus.

For customer service assistance, or problems with an ILL request filled by NLM, please use the ILL contact form.

Individuals who need access to medical literature should make a request through a local library or register with a Loansome Doc library that agrees to provide articles to them. 

Interlibrary Loan Billing

NLM offers two billing services. ILL Customers may choose to be billed through either the Electronic Fund Transfer System (EFTS) or LYRASIS.

Electronic Funds Transfer System (EFTS)


NLM also offers billing services through LYRASIS. The contact information for LYRASIS is:

P.O. Box 116179
Atlanta, GA 30368
Phone: 1-800-999-8558 x 3888

Preferred Delivery Methods

NLM's preferred delivery methods are email and post-to-web.