I have no idea what the actual number is, but I remember reading that Epic is in about 20% of hospitals. and in many&#x2F;most academic centers. Given the number of people who&#x27;ve been seen in an academic center at least once (whether for their own birth, a consultation at some point in life, ER visit, etc), Epic systems likely have entries on a substantial portion of the population, though the amount of people they have complete medical records for is likely much smaller