Program Leadership

Message from the Program Director

Danbury is a large, full service community hospital with strong academics. We provide primary care for the greater Danbury area and also serve as a regional referral center. Over the last 30 years we experienced tremendous growth in our patient population, faculty and residency program. There are over 150 outstanding and dedicated full-time teaching faculty in the Department of Medicine, spanning from primary care, hospitalists, to all subspecialties. The residency program offers strong clinical teaching, excellent research opportunities, a robust evaluation process and wellness program. We pay great attention to each resident’s personal growth and wellbeing.

I have served as APD/PD since I arrived in Danbury hospital in 1989. I have trained over 500 young physicians over the last 30 years. The most enjoyable part of my job is to teach and interact with our residents on a daily basis. The house staff keep myself and the faculty on our toes, help us stay current and be better physicians.

We are looking for motivated individuals who will thrive in a challenging but nurturing residency program. I am confident you will become an excellent internist and well prepared for a career in internal medicine and beyond.

Dr. Winston Shih - Program Director

Dr. Shih has served as the Associate Program Director/Program Director of the Internal Medicine Residency since 1989. Dr. Shih received his BSE from Princeton University, summa cum laude. He earned his medical degree from the New York University School of Medicine and was elected to AOA. He completed his residency training and Nephrology fellowship at the University of Pennsylvania. He also served as a Chief Resident. He is a Clinical Assistant Professor with Yale University School of Medicine. He is also the Chief of Nephrology & Hypertension and the director of the Nelson Gelfman Dialysis Unit at Danbury Hospital.

Message from the Chief Residents 

Dear Applicants,

Welcome to the Danbury Hospital website! We are so pleased that you are taking the time to check out our program. Danbury Hospital is a community-based program that is University affiliated. This aspect has allowed us to get a well-rounded clinical experience with a wide breadth of patient cases including a large underserved community. Our learning experience thrives due to the high faculty to resident ratio and high caliber specialty care. We have continuously benefited from the numerous perks of the residency, be it housing our intern year, attention to wellness, diverse group of residents, or the beautiful setting of Western Connecticut - a combination of suburban New England charm and proximity to NYC. The program continues to thrive through advancements such as expanding research opportunities including several clinical trials, internal projects, and of course presentations at various local and national conferences including ATS, CHEST, and ACC. It has also created a unique opportunity to learn point-of-care ultrasound techniques with our very own on-site training program.

We look forward to welcoming you as part of our family!

Chief Medical Residents  Jishu Motta, MD Polina Pinkhasova, DO Uladzislau Valynets, MD
Polina, Jishu, and Vlad

Program Leadership

Winston Shih, MD

Program Director, Internal Medicine Residency Program

Chief of Nephrology & Hypertension, Director of Nelson Gelfman Dialysis Unit



Aparna Oltikar, MD

Chairman, Department of Medicine

Vice President of Medical Affairs



William Delaney, MD

Associate Program Director

Director, Primary Care Clinic



Janaka Periyapperuma, MD

Associate Program Director

Hospital Medicine



Michael Schiffman, MD

Associate Program Director
Associate Director of Medical Education




Jishu Motta, MD Polina Pinkhasova, DO Uladzislau Valynets, MD

Chief Medical Residents

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Program Administrator

Kathy Barry