Andrew Zimolzak is an assistant professor at Baylor College of Medicine, department of medicine, section of health services research; and the Center for Innovations in Quality, Effectiveness and Safety (IQuESt). Dr. Zimolzak has studied the secondary use of routinely collected medical data for 10 years. He has direct experience with the retrieval and analysis of data from electronic medical records from multiple health care systems, as well as medical insurance claims. This work has been applied to physicians’ delayed follow-up of patient test results, diagnostic errors in the emergency department, randomized trials of medications for hypertension and heart failure, pharmacogenomics, lung cancer genomic precision medicine, kidney failure prediction, and outcome prediction in COVID-19. Dr. Zimolzak has practiced general internal medicine in urgent care and inpatient hospital settings for over ten years. In addition to research efforts, he is a teaching hospitalist at the Michael E. DeBakey VA Medical Center in Houston. His interests include deriving accurate phenotype information from medical records, machine learning for improved efficiency of data cleaning, and research code reproducibility and sharing. He has been funded by the Gordon and Betty Moore Foundation, and the Agency for Healthcare Research and Quality.