A board-certified internist, Dr. Greengold is Chief Medical Officer of the Clinical Tools division of Wolters Kluwer Health, which provides evidence-based disease and drug information for use at the point of care. She is also Associate Director of Applied Health Services Research at Cedars-Sinai Health System in Los Angeles, and Associate Clinical Professor of Medicine at the University of California, Los Angeles. Dr. Greengold has lectured extensively on the subjects of evidence-based medicine, outcomes research, and clinical decision support systems. She has published articles and editorials on evidence-based clinical guidelines and quality improvement. In 1996, Dr. Greengold cofounded Zynx Health Inc., a subsidiary of Cedars-Sinai that specializes in Web based tools for clinical knowledge management and the prevention of medication errors.