Michael Broder

Michael S. 35Broder, MD, MSHS


Michael S. Broder, MD, MSHS, is President and CEO of PHAR. He has more than fifteen years experience in health economic and outcomes research, and is board-certified Obstetrician-Gynecologist. Before joining PHAR, he served as Vice President of Zynx Life Sciences/Cerner Health Insights, a consulting and research firm in Beverly Hills, California. Dr. Broder received his research training in the Robert Wood Johnson Clinical Scholars Program at UCLA and RAND, attended medical school at Case Western Reserve University, and received his undergraduate degree from Harvard University. Dr. Broder has conducted research for industry, specialty societies, and government on a wide range of topics using a diversity of health service research methods. He has led expert panels to develop guidelines relating to use of estrogens, treatment of various cancers, surgical safety, and stroke prevention. He has published more than 50 articles in peer reviewed journals as diverse as The Journal of the American Medical AssociationAmerican Journal of Managed CareMedical Decision MakingJournal of Asthma, and Obstetrics & Gynecology. Dr. Broder is the author of two books and multiple book chapters. He is an Adjunct Professor at the Case Western Reserve School of Medicine, where he serves on the Council to Advance Human Health, and an Assistant Clinical Professor at the David Geffen School of Medicine at UCLA.


Eunice Chang

63Eunice Chang, PhD

Chief Statistician

Eunice Chang, PhD, is PHAR’s Chief Statistician. Dr. Chang is a mathematician and statistician highly experienced in the application of statistical analysis and design in a range of data types, including longitudinal nationwide survey data, electronic pharmacy and medical claims, and phase IV data. Before joining PHAR, she was Chief Statistician and Manager of Health Informatics and Health Outcomes Research at Prescription Solutions in Costa Mesa, California, where she was responsible for the methodology of retrospective and prospective clinical outcomes research and the evaluation of quality initiatives and disease-state management programs. This required the development of predictive models for pharmacy and medical costs and other healthcare utilization with data-mining techniques such as regression models, decision trees, and neural networks. Dr. Chang also served as Senior Statistician at PacifiCare Health Systems, where she led a team focused on quality initiatives and health improvement projects, including the development of a systematic sampling program for HEDIS 1999 measures. Earlier in her career, she provided statistical support for research grant proposals and study design at the David Geffen School of Medicine at UCLA.


David BeenhouwerDavid 4Beenhouwer, MD

Medical Director

David Beenhouwer, MD, Medical Director, is board certified in internal medicine and infectious diseases. He received his medical degree from Yale University and, after his residency at Columbia-Presbyterian Medical Center in New York, he completed a clinical and research fellowship in infectious diseases at Albert Einstein College of Medicine. In addition to his role as Medical Director at PHAR, Dr. Beenhouwer is an Assistant Professor of Medicine at the David Geffen School of Medicine at UCLA and an Infectious Disease Specialist in the VA Greater Los Angeles Healthcare System.


Dasha CherepanovDasha 6Cherepanov, PhD

Director, Outcomes Research

Dasha Cherepanov, PhD is Director, Outcomes Research. She has extensive experience measuring, tracking, and describing health-related quality of life (HRQoL), both nationally and among various subgroups of the United States population (including among individuals with chronic conditions). Much of her research has addressed methodological issues examining the properties of preference-based (utility) measures of HRQoL using psychometric and other advanced statistical methods. She served on the California Health Benefits Review Program faculty task force team that assesses the costs, medical effectiveness, and public health impacts of California health benefit mandates and repeals. Dr. Cherepanov has also been an invited reviewer for a number of peer-reviewed journals, including the American Journal of Public Health, Medical Care, and Quality of Life Research. She received both her undergraduate degree in mathematics and statistics (with distinction) and her doctorate degree in population health from the University of Wisconsin-Madison. She gained further training in health services research and policy analysis during a 2-year postdoctoral fellowship, funded by the Agency for Healthcare Research and Quality, at UCLA and the RAND Corporation.


srSheila 75Reiss Reddy, PhD, RPh

Director, Health Services Research

Sheila Reiss Reddy, PhD, RPh, is PHAR’s Director, Health Services Research. Dr. Reddy comes to PHAR with experience in pharmaceutical policy research, health economics, and quantitative evaluation, and with several years of practice as a pharmacist. She has worked with administrative claims and survey data for her research, drawing on her knowledge of patient care, quasi-experimental study design, and measurement. Dr. Reddy’s prior research centered on health care affordability, examining the impact of high-deductible health plan cost sharing on health care and drug utilization. Her work has been published in peer-reviewed journals, including Medical Care and Health Services Research. Dr. Reddy also brings global health expertise, having helped to manage multi-country program evaluations at the United Nations Children’s Fund and having organized public health initiatives in Cameroon as part of Peace Corps. She has been an ad hoc reviewer for journals such as JAMAMedical Care, and the Journal of the Royal Statistical Society. Dr. Reddy received her pharmacy degree from the University of Wisconsin, with clinical training in transplant pharmacotherapy. She received both her master’s degree in global health and her doctorate in health policy from Harvard University.




22Tingjian (Jessie) Yan, PhD,

Director, Health Services Research

Jessie Yan, PhD, is Director, Health Services Research. She has extensive experience conducting observational studies in multiple therapeutic areas and has advanced statistical and programming skills in analyzing large, medical and pharmacy claims databases, Medicare and Medicaid data, electronic health records. Her work has been published in various peer reviewed journals, including Journal of the American Geriatric Society, Neurology, and Stroke. Prior to joining PHAR, Dr. Yan worked as a Senior Researcher at HealthCore, Inc. She received her PhD in Gerontology from the University of Southern California and completed postdoctoral training in Health Services Research at the David Geffen School of Medicine at UCLA.


MarianneMarianne Eagan, M16Sc

Director, Operations

Marianne Eagan, MSc, is a Director of Operations. Marianne finished a Masters in International Health Policy from the London School of Economics in 2011 after receiving a bachelor’s degree in History of Science from Harvard University. At PHAR, Marianne supports many projects, including medical record reviews and systematic literature reviews. Prior to joining PHAR, she assisted the International Planned Parenthood Foundation with field research for a social franchise initiative in Thika, Kenya and spent eight months in Florida working as a field organizer during the 2012 Presidential election campaign.


Jesse OrtendahlJesse 8Ortendahl, MS

Associate Director, Health Economics

Jesse Ortendahl, MS, is Associate Director, Health Economics. He has a background in mathematics and statistics, and he has conducted disease simulation modeling for economic evaluations for over 10 years. He was trained in health policy at the Harvard School of Public Health, with a focus on decision science. Jesse formerly served as a research analyst at the Center for Health Decision Science at the Harvard School of Public Health, conducting grant-funded research primarily on the cost effectiveness of different cervical cancer prevention strategies. Jesse is an analyst and expert programmer, conducting modeling projects in TreeAge and Excel for a variety of clients. He is an active member of the Society for Medical Decision Making. 


Jennifer Munday, 15PhD, MPH

Senior Researcher

Jennifer Munday, PhD, MPH, is a Senior Researcher. Her work at PHAR focuses on secondary data analysis. Before joining PHAR, Dr. Munday was an Associate Research Scientist in the Yale University School of Medicine, Center for Outcomes Research & Evaluation (CORE) where she led a series of projects that used Medicare data to measure, track, and report national progress on health quality outcomes. She led the development of several of Medicare’s current quality outcomes measures. Dr. Munday is also an Adjunct Professor at San Diego State University and the University of New Haven where she has taught graduate level healthcare economics and public health courses. She completed a post-doctoral fellowship in the School of Population and Public Health at the University of British Columbia. She earned a PhD from the University of California, San Diego in Public Health and an MPH from The George Washington University.


Ryan TRyan22Tieu, MS


Ryan Tieu, MS, is a Statistician. He completed his undergraduate degree in Computational and Systems Biology at the University of California, Los Angeles and graduate degree in Biostatistics at the University of Minnesota, Twin Cities. Before joining the PHAR research team, he was a biostatistician for the Regional Research Committee at Kaiser Permanente Southern California department of Research and Evaluation where he was responsible for development and analysis of physician driven research from across the region and from a variety of clinical areas. He has experience dealing with a range of data from electronic medical record to genomic databases, performing analysis in SAS, R, and Python.


68Eric Bell, MBA

Applications Developer

Eric Bell, MBA, Applications Developer, has worked in the pharmaceutical and medical devices field for 15 years, developing budget impact models, cost-effectiveness models, and Monte Carlo simulations as well as performing claims-based analysis using Excel, SAS, Delphi, R, and TreeAge. He has more than 30 years of experience writing software in a variety of contexts, including for avionics, text editing, device drivers, stock market trading, workflow management, databases, and database-driven web applications. With an undergraduate degree in mathematics, Eric combines a strong quantitative background and excellent software development skills with a focus on providing high-quality solutions designed to meet our clients’ business needs.


16Sarah Gibbs, MPH

Project Manager

Sarah Gibbs, MPH, is a Project Manager. She has extensive experience in quantitative and qualitative research and evaluation methods, project management, and data visualization. At PHAR, Sarah supports many projects, including chart reviews and systematic literature reviews. Prior to joining PHAR, Sarah worked as a Senior Research and Evaluation Analyst at the National Association of County and City Health Officials in Washington, DC, conducting primary research to support the work of local health departments across the United States. Sarah received her Master’s in Public Health from the University of North Carolina at Chapel Hill and a bachelor’s degree in psychology from Duke University.



Jackie LeeJackie Lee, 5BS


Jackie Lee, BS, is an Analyst. Before joining the PHAR research team, she completed her undergraduate studies at the University of California, Los Angeles and received her degree in psychobiology. She has previously worked at the UCLA Louise M. Darling Biomedical Library where she received basic training in researching through medical reference databases. She assists in obtaining data for various chart studies, acquiring information for systematic reviews, and maintaining the PHAR reference database.



mtMarian Tarbox, M15PP

Research Assistant

Marian Tarbox, MPP, is a Research Assistant. She completed her undergraduate degree at the University of California, Davis and a Masters in Public Policy at Mills College. At PHAR, Marian supports a variety of health services research projects. Prior to joining PHAR, Marian worked as a Grant Assistant for the Behavioral Health Department at The Children’s Clinic of Long Beach, where the focus of her work was increasing department efficacy and quality of care through projects such as the implementation of a clinic-wide private rooming policy.


Amanda_MG_7942_Web95Amanda Harmon, MPH

Research Assistant

Amanda Harmon, MPH, is a Research Assistant. After completing her undergraduate degree in Biology from Claremont McKenna College, Amanda went on to receive a Master of Public Health with a concentration in Leadership and Management from Claremont Graduate University’s School of Community and Global Health. Before joining PHAR, Amanda worked as an emergency department scribe at Pomona Valley Hospital Medical Center, a Level II Trauma Center. At PHAR, Amanda supports the conduct and development of cost-effectiveness and budget impact models, systematic reviews, and various other studies.


Sohum G16Sohum Gokhale, MPH

Research Assistant

Sohum Gokhale, MPH, is a Research Assistant. He completed his undergraduate degree in Public Health Sciences at the University of California, Irvine and his graduate degree in Epidemiology at the University of California, Los Angeles. Prior to joining PHAR, Sohum was a research assistant at UC Irvine’s Heart Disease Prevention Program, where his work focused on cardiovascular disease risk related to hypertension. At PHAR, Sohum supports a variety of health services research projects, including developing abstracts, reports, and systematic reviews.