PROJECT SUMMARY/ABSTRACT The University of Chicago is requesting continued support from the Agency for Healthcare Research and Quality (AHRQ) for the National Research Service Award (NRSA) program entitled the University of Chicago And Northwestern University Predoctoral Health Services Research Program (UCANU Predoctoral HSR Program), a joint predoctoral training program that began in 2013. The program will provide two to three years of support to outstanding candidates from participating predoctoral programs from both University of Chicago (UC) and Northwestern University (NU): Comparative Human Development (UC), Economics (UC), Psychology (UC), Sociology (UC), Public Health Sciences (UC), Business (UC), Public Policy (UC), Social Work (UC), and the Health Sciences Integrated Program (NU). The UCANU Predoctoral HSR Program draws upon the substantial and complementary resources, faculty, and expertise at both UC and NU to create new opportunities for our trainees to develop into productive health services researchers. This program links the well-established UC predoctoral training program that includes a strong disciplinary base with an eleven-year- old, interdisciplinary predoctoral program at NU. The UCANU Predoctoral HSR Program will continue to enhance the training provided by both programs by offering trainees a highly diverse group of peers and mentors, a joint UCANU seminar where trainees can present their research, formal coursework opportunities, and a wide array of settings in which to perform HSR. In this newest iteration, we will continue offering training in learning health systems research and enhance program activities to provide additional focused training in implementation science and promoting health equity. Overall, the UCANU Predoctoral HSR Program aims to produce the next generation of highly skilled health services researchers who will have the skills to conduct independent and collaborative research that will transform health care delivery and policy and advance health equity.