Change agent. And he’s for hire. This is a compliment. Dr. Shreeve, an emergency medicine physician, took his first stab at entrepreneurship in 2002, when he founded Medsphere with his brother, Steve. In a clever play, the Shreeves commercialized a public domain version of the VA’s EMR system (VistA), and sold it to  hospitals and state health systems for less than, say, Epic. It only took a few sales to do well—very well. Then they hit a speed bump common to startups: a dispute with their investors. The Shreeves wanted to go full blown open source; the VCs said ‘No.’ And the industry watched the bizarre eight-digit lawsuit unwind all the mojo. Shreeve has since rebooted. Consulting through his  Crossover Health,  he tries to help other startups avoid some of the pitfalls of entrepreneurship, while pushing the boundaries. One such partner is Shlain, with whom he's trying to democratize the concept of concierge medicine.  Shreeve is a ubiquitous blogger, and he recently revisited an old theme -- that now has renewed currency: CODE RED - How Proprietary HIT Vendors May Screw Up Health Reform. He is positioned to influence innovation in one other way: Shreeve is one of a handful of health-entrepreneurs consulting to the X Prize Foundation on it's Healthcare X Prize. Basically, he's helping the prize-pickers determine the framework for giving away all those millions.