Epic, Cerner and Meditech are the largest EHRs and they combined control just about 50% of the market. Epic and Cerner tend more towards the Academic hospitals

Epic, Cerner and Meditech are the largest EHRs and they combined control just about 50% of the market. Epic and Cerner tend more towards the Academic hospitals and Meditech and McKesson (#4) tend towards the Commercial hospitals. There has also been a ton of incentive payments from CMS that have almost exceeded the EHR industry as a whole. There have also been quite a few big switches from the 90s to today, a bunch of them from Meditech/Epic/Cerner to others, so it can definitely happen.