Precision medicine is only possible because of how quickly and easily we can now sequence the human genome. But most people in the U.S. still have never gotten their genome sequenced. Genetic sequencing is still limited to university medical centers and hasn’t yet made its way to community hospitals, so most Americans’ doctors aren’t suggesting it. Even people who do want to get a genetic test have trouble because insurance often doesn’t cover the testing, which usually costs about $300 for a cancer panel. “For whole genome sequencing, cost is definitely still a barrier, it still costs about $10,000 dollars,” Stewart says. In the Mayo Clinic’s rare disease practice, most patients need this whole genome sequencing so that doctors can finally diagnose illnesses that have eluded treatment for years, and insurance only covers it about a third of the time, Stewart says.