Healthcare organizations across the globe are currently grappling to implement tools and practices to transform data from "refuse to riches," a movement propelled by mass adoption of electronic health records (EHRs), sensors, and servers that can hold an ever-expanding volume of digital data. 1 Allegedly, "By digitizing, combining and effectively using big data, healthcare organizations ranging from single-physician offices and multi-provider groups to large hospital networks and accountable care organizations stand to realize significant benefits." 2 The potential is ".. . to improve care, save lives and lower costs." 2 As a consequence, organizations are struggling under massive institutional pressures to make healthcare "data-driven" against the messy reality of creating, managing, analyzing, and using data for management, decision-making, accountability, and medical research. 3 However, data do not sit in ready repository, fully formed, and easily harvestable. 4 Data must be created through various forms of situated work. Even when data is a byproduct-"exhaust data"from other processes, data has to be filtered, analyzed, and interpreted. 5 While scholars have acknowledged the situated and effortful nature of data production along with the inherent subjectivities of data, these practices have been little investigated.