There are actually quite a few EMR software companies. My wife is an doctor and recently had to implement EPIC at her hospital. It was a rough transition. Important stuff though. Congrats!
Brother worked there for about a year, they have bad retention rate from what I hear. Almost always hiring, too. He applied as a technical writer and got re-assigned the day of to QA. Hope they either stepped it up since then or your other interviews are even better. On the bright side, once my brother's non-compete was done he got hooked up with UMiami which paid for his M.B.A. and he's the golden boy at work due to the tons he learned from EPIC . Whatever happens, coming out the other end, your skill set will be HIGHLY relevant and in demand if things continue the way they are. Congrats!