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Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.
The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.
Updates regarding government operating status and resumption of normal operations can be found at OPM.gov.

Undiagnosed Diseases Network (UDN)

The Undiagnosed Diseases Network (UDN) is a research study that is funded by the National Institutes of Health Common Fund . Its purpose is to bring together clinical and research experts from across the United States to solve the most challenging medical mysteries using advanced technologies.

Through this study, we hope to both help individual patients and families and contribute to the understanding of how the human body works.

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Last updated: December 10, 2024