AthenaHealth's plan to fix healthcare hinges on tiny hospitals

Edmund Billings spends about three weeks out of the month living out of a suitcase. He racked up 20,000 miles on the road in the past nine months, while driving to some of the most rural and remote parts of the country. Billings is a traveling salesman of sorts, but his business isn't vacuum cleaners or encyclopedias. It's health software. Billings is the associate chief medical officer for acute care at AthenaHealth, an IT company with a market cap of more than $5 billion.