Program Snapshot

UDN logo

The Common Fund’s Undiagnosed Diseases Network (UDN) is a research study to improve and accelerate diagnosis of rare and undiagnosed conditions. The UDN uses both basic and clinical research to improve the level of diagnosis and uncover the underlying disease mechanisms associated with these conditions.

Who is in the Network?

The UDN is a group of clinical and research centers across the United States. More information about the centers that make up the UDN can be found here.

UDN Sites


For more information about the UDN or application process, individuals can contact the UDN Coordinating Center by:

  • Telephone
    • Toll-free from USA, Canada, Mexico: 1-844-RING UDN (746-4836)
    • From all other countries: 1-617-432-2344


Or Visit the UDN Coordinating Center Website

This page last reviewed on March 6, 2019