Ventana. Dr. Colella may be the best qualified for healthcare entrepreneurism of anyone on this list. It is a resumé to make credential-conscious VCs drool: technical expertise, operational experience and a track record of execution. (Read: ROI!) Trained in psychiatry and neurology with an MBA from Columbia Business School, Dr. Colella practiced medicine for a decade before working as a consultant with the Boston Consulting Group, SAI, and finally Sapient. In 1999 he cofounded RelayHealth, an early innovator in online consults between doctors and patients with a service called webVisit. A progenitor, if crude, of services like American Well. Dr. Colella sold it to McKesson in 2006. McKesson has since leveraged some Relay assets into ADM. Most recently, and with list member #2 Todd Park, Dr. Collela cofounded Ventana, which aims to be the Travelocity for healthcare. An ambitious model to attempt in this industry, but we wouldn't bet against him. 

At the time of RelayHealth's sale:

"Physicians have increasingly Internet-savvy patients...patients with chronic diseases -- the cost of which accounts for more than 80% of all healthcare spending -- will embrace online chronic care management provided by their own personal physicians."