Epic is not just winning the electronic health record (EHR) market anymore. It is becoming the default. When two health systems merge today, the odds are good that both sides were already on Epic, or one of them was about to be. It would be reasonable to assume that shared software shortens the integration timeline. It turns out that it doesn’t, and the reason has nothing to do with the software itself. What actually drives the timeline is subject matter expert (SME) availability, the degree of business-process alignment between the two organizations, and the quality of the source data.

Over the past year, trade coverage of healthcare M&A has followed several EHR consolidations worth watching. One of the clearest examples of what good discipline looks like is CommonSpirit Health.

CommonSpirit was formed in 2019 through the merger of Dignity Health and Catholic Health Initiatives, combining two organizations that had each accumulated their own sprawling technology footprint. Three years later, CEO Wright Lassiter III took over and later summed up the scale of the problem: CommonSpirit “had more EHR versions than I have fingers on both hands.” Seven years after the original merger, executives set a target: full standardization by 2030. The company now reports 65 percent of the organization on Epic, with two of eight planned migration waves complete.

The real win here is not the percentage. It is that these executives appear to understand that project length cannot be predicted at the outset, and that early progress does not tell you how much work remains, only how much has already been done. Managing that expectation, at every level of the organization, is what keeps pressure from turning into panic. We cannot know for certain, but leadership’s public statements read as pragmatic: if unforeseen complications surface in the remaining waves, we would expect the timeline to move again. The key to success is managing to a goal, not to a date.

Northwell Health is running a similar playbook at a larger scale, unifying more than 30 record systems onto Epic in a 1.2 billion dollar effort that only got more complicated when Northwell closed its acquisition of Nuvance Health mid-project. That is its own story, and one worth a dedicated post soon.

This connects to something we have written about before: a good estimate gets sharper at each checkpoint, and it stays an estimate until whichever trial migration finally clears both technical and UAT validation. CommonSpirit did not know what 2030 would look like back in 2019. They learned it by living through seven years of actual work. That is not a failure. It is what an honest timeline looks like once real evidence starts arriving.

If you are setting a timeline for your own migration, treat CommonSpirit as a reference point, not a template. Your numbers will not be theirs. The discipline behind them can be.

Originally posted on LinkedIn.