The Undiagnosed Diseases Program
The National Institutes of Health (NIH) Undiagnosed Diseases Program (UDP) is part of the Undiagnosed Disease Network (UDN), an NIH Common Fund initiative that focuses on the most puzzling medical cases referred to the NIH Clinical Center in Bethesda, Maryland. It was organized by the National Human Genome Research Institute (NHGRI), the NIH Office of Rare Diseases Research (ORDR) (now the National Center for Advancing Translational Sciences Division of Rare Diseases Research Innovation) and the NIH Clinical Center.
Undiagnosed Disease Program Staff
![William Gahl](/sites/default/files/media/images/2023-10/gahl_william.jpg)
William A. Gahl, M.D., Ph.D.
- Director
- NIH Undiagnosed Diseases Program
![David Adams](/sites/default/files/media/images/2022-08/adams_david.jpg)
David Adams, M.D., Ph.D.
- Co-Director
- NIH Undiagnosed Diseases Program
![Valerie Maduro](/sites/default/files/media/images/2023-05/Maduro_Valerie.jpg)
Valerie Maduro
- Translational Laboratory Manager
- NIH Undiagnosed Diseases Program
![Camillo Toro](/sites/default/files/media/images/2023-08/toro_camillo.jpg)
Camilo Toro, M.D.
- Senior Clinician
- NIH Undiagnosed Diseases Program
![Francis Rossignol](/sites/default/files/media/images/2023-05/Rossignol_Francis.jpg)
Francis Rossignol, M.D.
- Staff Clinician
- NIH Undiagnosed Diseases Program
![Donna Novacic](/sites/default/files/media/images/2023-10/Danica-Novacic.jpg)
Donna N. Novacic, M.D.
- Staff Clinician
- NIH Undiagnosed Diseases Program
![Sandy Chow](/sites/default/files/media/images/2023-12/chow_sandy.jpg)
Sandy Chow, MSN FNP-BC ENP-C
- Advanced Practice Nurse
- NIH Undiagnosed Diseases Program
![Carolyn Allen](/sites/default/files/media/images/2024-01/carolyn_allen.jpg)
Carolyn Allen, DNP
- Advance Practice Nurse (Nurse Practitioner)
- NIH Undiagnosed Diseases Program
![Elizabeth Burke](/sites/default/files/media/images/2023-10/burke_elizabeth.jpg)
Elizabeth A. Burke, Ph.D.
- Scientist
- NIH Undiagnosed Diseases Program
![Generic Profile Photo](/themes/custom/nhgri/assets/global/nhgri_generic_profile.png)
Lynne A. Wolfe, M.S.
- Nurse Practitioner
- NIH Undiagnosed Diseases Program
![Jason McFadden](/sites/default/files/media/images/2023-11/jason-mcfadden.jpg)
Jason R. McFadden
- Postbaccalaureate Fellow
- NIH Undiagnosed Diseases Program
![Yan Huang](/sites/default/files/media/images/2023-10/huang-yan.jpg)
Yan Huang
- NIH Undiagnosed Diseases Program
![Marya Sabir](/sites/default/files/media/images/2023-10/marya-sabir.jpg)
Marya S. Sabir
- Predoctoral IRTA Fellow
- NIH Undiagnosed Diseases Program
![Wiljeen Paul](/sites/default/files/media/images/2023-10/paul-wiljeen.jpg)
Wiljeen Paul
- Postbaccalaureate Fellow
- NIH Undiagnosed Diseases Program
![Christopher Song](/sites/default/files/media/images/2023-11/christopher_song.jpg)
Christopher B. Song
- Postbaccalaureate Fellow
- NIH Undiagnosed Diseases Program
![Zoe Wolfenson](/sites/default/files/media/images/2023-10/wolfenson-zoe.jpg)
Zoe M. Wolfenson
- Postbaccalaureate Fellow
- NIH Undiagnosed Diseases Program
![Julia Grafstein](/sites/default/files/media/images/2024-06/grafstein_julia.png)
Julia Grafstein
- Postbaccalaureate Fellow
- NIH Undiagnosed Diseases Program
Last updated: June 24, 2024