There's little question that Cerner and Epic are the giants in the EHR field. Epic is dominant not only in the scope of its market share but also in the depth of its client base. Mayo Clinic announced last month that it would be abandoning its three current EHR systems in favor of a new contract with Epic, which will now be the healthcare icon's sole EHR provider and strategic partner. Jilted in the deal were GE and Cerner, who were the providers of Mayo's current systems—although if you tallied the figures when Cerner acquired Siemens' EHR unit for $1.3 billion, it still had the largest US market share of any vendor, with 1,132 acute care hospitals.
But a more granular look at market share amongst physician offices shows a slightly different market picture.
Epic is still on top, but only by a percentage point (eClinicalworks is close on its heels). And as you might expect, Epic's client base skews heavily towards larger practices, dominating the 41+ practice market at 54%. On the lower end of the scale (1 - 3), Epic, eClinicalworks, Allscripts and Practice Fusion are all within a percentage point or two of one another.
Cerner, notably, is way down the list across the board in the physician practice world, taking just 3.5% of the overall market. So is athenahealth, at 3.3% overall and just 0.4% and 0.8% in the 26 to 40 and 41 and up segments. This tallies with the cloud-based vendor's ongoing investments in the inpatient market, however: In January, the cloud-based provider purchased start-up RazorInsights to move into the 50-bed and under sector, a niche that accounts for one-third of all hospitals in the US; and last week the company announced that it has purchased WebOMR, Beth Israel Deaconess' cloud-based, stage 2-certified EHR, for commercial development in the hospital setting.