Rare Disease Database
NORD's Rare Disease Database provides brief introductions for patients and their families to more than 1,200 rare diseases. This is not a comprehensive database since there are nearly 7,000 diseases considered rare in the U.S. We add new topics as we are able to do so, with the help of rare disease medical experts.
A rare (or orphan) disease is generally considered to have a prevalence of fewer than 200,000 affected individuals in the United States. A rare disease is usually an estimate and may change over time. Although the list is updated regularly, it should not be used as a reference or guarantee that a condition is rare.
If you are seeking information about a rare disease that is not in this database, we would suggest contacting the Genetic and Rare Diseases Information Center (GARD) at the National Institutes of Health. NIH has the most complete database of rare diseases in the U.S.
Representatives of patient organizations whose medical advisors are interested in assisting NORD in creating a report on a disease not currently covered in this database may write to email@example.com.
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Individuals can access two full reports in a 24-hour period.
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