The rare disease challenge
Rare disease statistics
The numbers behind rare disease: how many conditions exist, how many people they affect, how long a diagnosis takes, and why finding patients earlier matters. Every figure links to its primary source.
Last reviewed:
The scale
Rare disease is anything but rare.
- 10,000+
- known rare diseases
- 1 in 10
- Americans live with one (over 30 million people)
- <5%
- have an FDA-approved treatment
Source: NORD
How it presents
Mostly genetic, and mostly early.
- ~72%
- of rare diseases are genetic in origin
- ~70%
- have pediatric onset
The diagnostic odyssey
A diagnosis measured in years.
- Years
- average time from first symptoms to a correct diagnosis, with many waiting far longer
- Multiple
- specialists seen, often after one or more incorrect diagnoses
Why earlier matters
Found sooner, outcomes change.
- 73% → 87%
- five-year survival in SCID after newborn screening enabled earlier treatment
Source: NIH/NCATS
Sources
Where these figures come from.
- National Organization for Rare Disorders (NORD), Rare Disease Facts and Statistics. Link
- Nguengang Wakap S, et al. Estimating cumulative point prevalence of rare diseases: analysis of the Orphanet database. Eur J Hum Genet, 2020. Link
- EURORDIS Rare Barometer, Time to diagnosis and determinants of diagnostic delays of people living with a rare disease. Orphanet J Rare Dis. Link
- NIH National Center for Advancing Translational Sciences, Newborn Screening for Rare Immune Disorders Led to Earlier Treatment, Improved Survival. Link
This page is for general educational purposes and is not medical advice.
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