What is a rare disease/disorder? A disease or disorder is defined as rare in the USA when it affects fewer than 200,000 Americans at any given time.  Know of one we don't have listed?  Send us an email! 

Angelman Syndrome 

Prader-Willi Syndrome

Cystic Fibrosis

Kartagener Syndrome 

Pitt-Hopkins Syndrome

Christianson Syndrome

Rhizomelic Chondrodysplasia Punctata (RCDP)

Moebius Syndrome

Marfan Syndrome

Jacobsen Syndrome

Smith-Magenis Syndrome 

Rhett Syndrome

Fragile X Syndrome

Mowat-Wilson Syndrome

Phelan-McDermid Syndrome

Kleefstra Syndrome

KCNMA1 Channelopathy

Cornelia de Lange Syndrome (CdLS)


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Hill Country Advocates for Angels


Prader-Willi Syndrome