Chicago's newest billionaire, 31-year-old Rishi Shah, is self-made

Rishi Shah, who quit college to pursue entrepreneurial dreams, became a billionaire last week. And his business partner, Shradha Agarwal, is close behind.

Their windfall came with a $600 million infusion of venture capital into Outcome Health, the Chicago health care tech company they founded in 2006. It's now valued at $5.6 billion.

Outcome Health installs touch screens in doctor's offices and uses specialized software to help physicians and patients make treatment decisions. Health care marketers and pharmaceutical companies use them too.

Not since Groupon has a company raised that kind of capital in a single round of funding. In 2011, Groupon raised $950 million from investors in a fifth round of funding. For Outcome Health, it's the first infusion of investment money.

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