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General Preventive Medicine Residency


Program Director

Clarence LamClarence Lam, MD, MPH serves on faculty and as the program director of the preventive medicine residency program at the Johns Hopkins Bloomberg School of Public Health. Lam is a Phi Beta Kappa graduate of Case Western Reserve University where he completed his Bachelor of Arts in political science and biology. He earned his medical degree from the University of Maryland and his Master of Public Health from Johns Hopkins University. He completed his residency training at Johns Hopkins, where he also served as chief resident, and is board-certified in preventive medicine.

In November 2014, Clarence Lam was elected to serve as a state delegate representing District 12, which includes both Howard and Baltimore Counties, in the Maryland General Assembly, where he currently serves on the House Environment and Transportation Committee. He is one of only four physician-legislators currently in the Maryland General Assembly.

While in medical school, Lam was elected as the student-body president of the University of Maryland, Baltimore, and he interned on the health affairs staff of the Committee on Oversight and Government Reform of the U.S. House of Representatives where he assisted oversight investigations on drug safety policy. He also served as a biodefense analyst at the Center for Biosecurity of the University of Pittsburgh Medical Center and authored several publications on public health preparedness. From 2009-2014, he served on the legislative staff of Delegate Dan Morhaim, MD in the Maryland General Assembly.

Clarence Lam is involved in many community organizations and serves on several non-profit boards of directors, including Healthy Howard, Unified Community Connections (formerly the United Cerebral Palsy of Central Maryland), and as board chair of the Community Action Council of Howard County, which manages the county’s food bank, Head Start program, and provides for energy and housing assistance to residents in need. He was a past appointee to the Governor’s Commission for Asian Pacific American Affairs and to Howard County’s Spending Affordability Advisory Committee.

Clinical Director


Kimberly Gudzune, MD MPH, FTOS is board-certified in Internal Medicine, a diplomat of the American Board of Obesity Medicine, and a Fellow of The Obesity Society. She received her bachelor’s degree in environmental biology from the University of Colorado. She attended Tulane University in New Orleans, Louisiana, where she received her doctor of medicine and master of public health degrees. She completed her training in internal medicine at the University of Maryland Medical System. After residency, she completed a clinical research fellowship within the Division of General Internal Medicine at the Johns Hopkins University School of Medicine. She joined the faculty of the Johns Hopkins University School of Medicine as an Assistant Professor in 2012. She currently practices as an obesity medicine specialist at the Johns Hopkins Digestive Weight Loss Center.

Gudzune’s research focuses on obesity, specifically how patient obesity influences the healthcare experience, the efficacy of commercial weight-loss programs, and how features of the built and social environment influence diet and exercise habits among low-income urban populations. Her research has won several awards, in addition to being featured by news outlets including The New York Times and National Public Radio. She has been recognized for her outstanding mentoring of trainees with the 2015 Frederick L. Brancati Excellence in Mentoring Award at Johns Hopkins. Gudzune joined the Preventive Medicine Residency in 2018 as Clinical Director.


Academic Directors

Elham HatefElham Hatef, MD, MPH serves as faculty at the Center for Population Health IT (CPHIT) in the Department of Health Policy and Management and as the academic director of the Johns Hopkins General Preventive Medicine Residency Program. As the academic director of the program she provides training and mentorship to the residents throughout their residency. She earned her medical degree from Tehran University of Medical Sciences, in Tehran, Iran and her Master in Public Health from Johns Hopkins Bloomberg School of Public Health (JHSPH).  Hatef completed a preliminary year in Internal Medicine at Yale-affiliated Griffin Hospital in Connecticut and Preventive Medicine Residency and Chief Residency at JHSPH. She then completed Clinical Informatics Practice Pathway at JHBSPH.  Hatef is board certified in Preventive Medicine-Public Health and Clinical Informatics.

Her main field of interest is population health, social determinants of health and health information technology. She studies the impact of social determinants of health on health-related outcomes using health IT and Big Data. She is involved in a number of projects in this area. At CPHIT she has served as the project leader on the development of population health framework and measurements for Maryland, a collaboration with CRISP (Chesapeake Regional Information System for our Patients) supported through Maryland State Improvement Model and Centers for Medicare and Medicaid Services. She also led the project to incorporate relevant available community/population level data sources into the Veterans Health Administration (VHA)'s electronic health records. This project aimed to evaluate the health outcomes such as hospitalization rate at the primary care level while addressing social determinants of health. In addition, in collaboration with other faculty at CPHIT she works on new methods of data mining and natural language processing to address social determinants of health using structured and non-structured electronic health records (EHR) data and publicly available population level data such as U.S. Census.


Chief Resident 

Nolan O'Dowd, MD, is the Chief Resident of the General Preventive Medicine Residency Program for the 2020-21 academic year. He received his bachelor’s degree in cognitive science from the University of California, San Diego, graduating summa cum laude. After receiving his medical degree from the University of Maryland, where he was inducted into the Alpha Omega Alpha Honor Society and the Gold Humanism Honor Society, he completed his intern year in Internal Medicine-Pediatrics at MedStar Georgetown University and then started his Preventive Medicine training here at Johns Hopkins. He is the first PM-2 resident in the program to simultaneously serve as Chief Resident.

During his first year of the residency, he became involved in the Food Systems Concentration within the MPH program while also piloting a Food Insecurity screening program at a local primary care clinic. He has also joined the leadership for the Margaret Brent Cooking Club, a resident-led after-school cooking, nutrition, and leadership program for students in a local Baltimore neighborhood school. Nolan has found himself in a teaching role throughout his medical training, and has continued to teach both medical students and fellow MPH students in various forms during his Preventive Medicine residency.

When not working, you can find him exploring Maryland’s local hiking trails, playing the guitar, or dabbling in more hobbies than one person should have. He plans to work in a public health sector that tackles the core issues driving chronic disease and health inequities.