Regenstrief Institute, Inc

Thomas S. Inui, ScM, MD, President and CEO of Regenstrief Institute, Inc. and Sam Regenstrief Professor of Health Services Research; Professor of Medicine and Associate Dean for Health Care Research, Indiana University School of Medicine.

Health Services Research/IUCHSOR

Michael Weiner, MD, MPH, Associate Director and Research Scientist, Regenstrief Institute, Inc., is director of the Institute's Health Services Research Program as well as the IU Center for Health Services and Outcomes Research. He is also Director of the Department of Veterans Affairs Health Services Research and Development Center of Excellence on Implementing Evidence-based Practice, located at the Richard L. Roudebush VA Medical Center in Indianapolis. 

Associate Professor of Medicine, Dr. Weiner joined the IU School of Medicine faculty and the Regenstrief Institute in 1999, following undergraduate work at Brown University, medical school at Duke University, and residency and fellowship at The Johns Hopkins University. While at Hopkins, he also earned a master’s degree in public health. In 2003, Dr. Weiner was awarded the Outstanding Researcher Award from the Division of General Internal Medicine & Geriatrics, Indiana University School of Medicine.

Dr. Weiner’s professional interests are health services research, geriatrics, and health informatics. At IU Geriatrics, he founded the gero-informatics program, which under his leadership focused on leveraging health information technologies to improve the care of older adults.  His clinical and health-services research is focused on measuring and improving the quality, coordination, and delivery of health services for older adults. He also studies the effects of health information and information technology on physicians' practices and patients' outcomes. Dr. Weiner has conducted studies of specialty referral, patient-physician videoconferencing, and other forms of telecommunication to improve healthcare. Current research includes development, implementation, and study of information systems to promote clinical handoffs, management of medications, patient-centered geriatrics care, and clinical decision support.

Medical Informatics

J. Marc Overhage, MD, PhD, is Director of Medical Informatics and Research Scientist, Regenstrief Institute, Inc., President and CEO of the Indiana Health Information Exchange, Regenstrief Professor of Medical Informatics and Professor of Medicine at Indiana University School of Medicine.

Dr. Overhage has spent over 25 years developing and implementing scientific and clinical systems and evaluating their value.  Working with Dr. Clement McDonald, one of the pioneers of medical informatics, he has created an electronic patient record (called the Indiana Network for Patient Care) containing data from many sources including laboratories, pharmacies and hospitals in central Indiana.  The system currently connects nearly all acute care hospitals in central Indiana and includes inpatient and outpatient encounter data, laboratory results, immunization data and other selected data.  In order to create a sustainable financial model, he helped create the Indiana Health Information Exchange, a not-for-profit corporation.  Over the last five years, he has played a significant regional and national leadership role in advancing the policy, standards, financing and implementation of health information exchange.

Dr. Overhage is also an expert in clinical decision support including inpatient and outpatient computerized physician order entry and the underlying knowledge bases to support them.

Data Analysis

William M. Tierney, MD, is Director of the Regenstrief Center for Healthcare Improvement and Research (RCHIR) and Senior Research Scientist, Regenstrief Institute, Inc.; Chancellor's Professor in the Department of Medicine of the Indiana University School of Medicine; Director of Research for the Indiana University Kenya Program; and Indiana University Site Director for the National Health Information Technology Resource Center, AHRQ Resource Center for Practice-Based Research Networks.

Dr. Tierney is an internationally recognized expert in medical informatics and health services research, known for implementing and assessing electronic medical record systems to enhance quality of care. He led the team that was first to demonstrate that computerization of hospital orders can substantially reduce cost and medical errors.  The technology he evaluated now supports care for large patient populations in Indiana and sub-Saharan Africa.

In addition to informatics-based health services research, he has also performed dozens of epidemiologic studies utilizing the clinical data stored in the clinical data repositories created by the Regenstrief Institute and Indiana University's collaborative care program in east Africa.

Marc B. Rosenman, MD, Research Scientist, Regenstrief Institute, Inc.; Assistant Professor of Pediatrics, Children's Health Services Research, Indiana University School of Medicine, Director, Health Data and Epidemiology Section, Regenstrief Institute, and faculty supervisor for the Regenstrief Institute's data management group.

Dr. Rosenman's research focuses on clinical epidemiology, electronic medical records systems, and health information from multiple sources.

Education and Training

Kurt Kroenke, MD, Research Scientist, Regenstrief Institute, Inc.; Professor of Medicine, Indiana University School of Medicine.

Dr. Kroenke focuses his clinical research on the optimal evaluation and management of common symptoms such as pain, fatigue, dizziness, and other physical complaints. He also conducts research on depression, anxiety and other mental disorders in primary care. His methodologic expertise includes clinical trials, questionnaire development, clinical epidemiology, and health services research. He is the Director of Fellowship Programs for the Institute, and the Director of the Indiana University Clinical Investigator and Translational Education (CITE) Program which provides a campus-wide Masters of Science in Clinical Research degree for fellows and junior faculty from numerous disciplines.

Center for Aging Research

Christopher M. Callahan, MD, Associate Director and Research Scientist, Regenstrief Institute, Inc.; Cornelius and Yvonne Pettinga Professor in Aging Research, Professor of Medicine, Indiana University School of Medicine; Director, Indiana University Center for Aging Research.

Dr. Callahan’s research seeks to improve the outcomes of care for older adults with late life depression and dementia. His work explores innovative models of care that support the generalist physician in their day-to-day provision of health care for older adults. These new models of care focus on collaboration between health care providers, patients, and family as well as across the continuum of care with an emphasis on the application of information technology.