In 2021, the NYU Health Sciences Library (NYU HSL) developed an evaluation protocol to identify research outcomes from datasets generated from electronic health records (EHR) at the medical center. This evaluation stems from a pilot program in 2018, where the NYU HSL collaborated with DataCore, a clinical research data management unit, to catalog queries underlying researcher requests for data abstraction from the EHR. This poster, presented at the 2022 Annual Meeting of the Medical Library Association, describes the methodology and findings from the evaluation, which focused on two characteristics of secondary data use: the intended purpose of the data extract and research outputs associated with the extract.