John Doerr made a fortune for his venture firm through an early investment in  Amazon , when it was just an online bookseller. More than two decades later, he’s betting the company is preparing for a big move into health care.

Speaking at the  Forbes Healthcare conference  this week, Doerr said Amazon is among the best-positioned companies to take information its learned from customers and use it to their benefit. He’s expecting CEO  Jeff Bezos  to roll out an offering for medical and health products that resembles Amazon Prime, which has over 100 million users.