Thank you for your interest in the Washington University in St. Louis for Undiagnosed Diseases Clinical Site, a multi-disciplinary research center focused on diagnosing rare and unknown diseases. Should you or someone you know be interested in our services please review the requirements and application guidance below. Please note we are a research program and currently unavailable for traditional clinic services. All applicants should continue with all standard medical care during the time of application to our program. In addition to the clinical referral by a clinician of your choice, the standard application includes a 15-30 minute online application and is provided in English. Should you require language translation services, in-print options, or further assistance for your application, you may contact the Undiagnosed Diseases Network Coordinating Center for assistance at 1-844-746-4836 (1 844 Ring UDN).


1. Applicant has a rare condition without diagnosis which explains the objective findings.
2. Applicant must be able to travel safely to the UDN clinical site of acceptance.  For information on eligibility and our research protocol visit here.