When former Wall Street analyst Ramji Srinivasan dropped out of Stanford’s Graduate Business School in 2007, he thought he was leaving to launch a healthcare software company. Almost 10 years later, Ramji is the CEO of a fast-growing clinical laboratory offering a genetic testing service that is helping to improve the lives of half a million patients, providing a new step forward in personalized medicine based on your DNA. Counsyl is doing genetic tests that look for more than 400 mutations and at least 100 genetic disorders for parents who are planning children. At $599 total, or $99 with insurance, their tests cost a fraction of standard ones, which often only look for a single condition like cystic fibrosis, and run anywhere from $100 to $500. “We want to make the genome practically useful,” said CEO Ramji Srinivasan.