Despite advancements in genetic testing, people with rare diseases often face a prolonged diagnostic odyssey involving multiple physician visits and misdiagnoses. Genetic testing company GeneDX is working to shorten the path to a diagnosis by expanding access to sequencing, collaborating with researchers, and accumulating data to better understand gene-disease relationships. We spoke to Katherine Stueland, CEO of GeneDx, about the state of genetic testing, what its 2022 acquisition by the AI-drive genomics company SEMA4 has meant to it, and what she thinks it will take to make meaningful change to the diagnostic odyssey.