PGY-3 Residents
2013 residents

Matthew Humphreys, MD

Matthew is an Undersea Medical Officer in the US NAVY Medical Corps where he has worked with Navy SEALs, EOD and the Navy Submarine Fleet. He completed a BS in Biochemistry from UC Santa Cruz before obtaining his MD from the Uniformed Services University of the Health Sciences in Bethesda, Maryland. Matthew completed a transitional internship year at the Naval Medical Center in San Diego. Matt will continue his career in Preventive Medicine with the Navy and is interested in improving Navy health policy and health promotion, as well as influencing preventive practices and social determinants of health in the Navy. In addition to his studies, Matt enjoys his free time surfing and going to the beach with his wife and four children.


Ryan Moran, MD

Ryan holds a Bachelor’s in Economics from the University of California, Davis and earned his MD from the University of Maryland, School of Medicine.  After Ryan obtained his medical degree, he completed three years of internal medicine residency at the University of Maryland. He has had several opportunities to incorporate economics into his clinical interests including a rotation with the World Health Organization focusing on the role of incentives with tobacco. His preventive medicine interests lie between health policy, health economics and clinical care


Porchia Rich, MD, MPH, MSW

Porchia grew up in San Diego, California, and earned her bachelor’s in Psychology from the University of Chicago. With a passion for population health she then obtained a dual-Masters in Social Work and Public Health from the University of Michigan. Porchia went on to receive her MD from the Keck School of Medicine of the University of Southern California. Porchia is currently a post-doctoral fellow working on a research project surrounding physical activity and built environments with Dr. Jacqueline Kerr at UCSD. She is specifically looking at how increasing physical activity in older adults affects the use of blood pressure medications. Porchia enjoys Pilates, watching classic movies, and spending time with her fiancé and two young sons.


Deepa Sannidhi, MD


Deepa was born and raised in New Jersey. She attended Rutgers University where she earned her Bachelors degree in Biology, Nutritional Science and Religion, and developed a passion for integrating Nutritional science and Integrative Medicine. Deepa ultimately attended Rutgers - New Jersey Medical School, and recently completed a family medicine residency at Hunterdon Medical Center Department of Family Medicine. Deepa is excited to pursue a Preventive Medicine Residency at UCSD. Her long-term interest lies in creating health care delivery models that better allow primary care physicians to practice lifestyle medicine in a clinical setting. She plans to use the amazing resources at UCSD to become an expert in the fields of Nutrition, Obesity, Lifestyle, and Integrative Medicine research. Deepa loves everything about food - going to restaurants, cooking it, and reading about it. She even blogs about it! She’s super excited to explore San Diego with her husband and high school sweet-heart.

PGY-2 Residents



David Crabtree, MD

David grew up in rural southwestern Virginia and graduated from East Tennessee State University with University Honors and a BS in history. He then went on to graduate from ETSU - Quillen College of Medicine, having earned his MD with AOA honors. He completed an internship in psychiatry at the University of California - San Diego before transitioning to preventive medicine. Professional interests include alcohol/drug abuse prevention (especially in adolescents/young adults) and mental health. David hopes to pursue addiction medicine fellowship after gaining insight and competencies in how preventive medicine can be utilized to improve the lives of patients with addiction disorders. In his spare time, David enjoys running, swimming, spending time with his dog “Marlo,” and going to electronic dance music festivals.

2013 residents

Emily McDonald, MD



Samuel Park, MD

After earning his M.D. at the University of California San Diego School of Medicine, Sam decided to switch paths from a surgical career to Preventive Medicine. His experiences from two years of surgery residency helped shaped this decision after he learned the value of health management decisions in affecting patient populations. Inspired by his experiences, he also made the decision to pursue further education in Health Management and Policy with San Diego State University’s Masters in Public Health program to mature his interest in serving patient populations. Sam envisions a future career spent part-time in clinical practice and part-time in a physician leadership/management role with a focus on quality and performance improvement.

2013 residents

Sankar Sridaran, MD



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Amish Talwar, MD


Amish received his BA in Political Science from Rutgers University before completing his MD at Columbia University. After having undertaken HIV research in the Dominican Republic during medical school, he elected to pursue a career in preventive medicine with a focus on global health. His areas of interest also include vector-borne diseases and health informatics.