An article by Susan Young:

EXCERPT

"Today, sequencing a human genome can cost less than $5,000 and take only a day or two. This means genome analysis is now in the cost range of a sophisticated medical test, said Eric Green, director of the National Human Genome Research Institute, in a teleconference on Friday. Doctors can now using DNA analysis to diagnose challenging cases, such as mysterious neurodevelopmental disorders, mitochondrial disease, or other disease or unknown origin in children. In such cases, genomic analysis can identify disease-causing mutations 19 percent to 33 percent of the time, according to a recent analysis."

SOURCE

http://www.technologyreview.com/view/513666/a-decade-of-advances-since-the-human-genome-project/