Chief Residents

Four residents are chosen annually to stay an additional year as chief residents. On a rotational basis, two of the chiefs are always present at The Mount Sinai Hospital, one at the Bronx VA Medical Center, and one at Elmhurst Hospital. These chief residents work closely with the chair and the vice chairs of the Department of Medicine and provide leadership throughout the Residency Training Program. They are the liaison between the day-to-day workings of the house officers, the administration of the department, and the various hospitals. They have significant teaching responsibilities and are expected to be future leaders in medicine.

The 2015-16 Chief Residents are:

Rafael Harari, MD, graduated from New York University with a BA in Biology and received his MD from the Icahn School of Medicine at Mount Sinai before joining the Categorical Internal Medicine Residency Program in 2012.  He currently serves as Chief Resident for the Department of Medicine and is pursuing a fellowship in Cardiovascular Disease.  Rafael is planning a career in academic medicine, with a focus on cardiac critical care, clinical research and medical education.    


Yasmin Genevieve Hernandez, MD, received her BA in Business Management from Manhattanville College and an MD from Stony Brook University School of Medicine. During medical school, she was inducted into the Alpha Omega Alpha Honor Society and Gold Humanism Honor Society, as well as awarded the Glasgow-Rubin Citation for Academic Achievement in recognition of her commitment to academic excellence and patient-centered care. She currently serves as Chief Resident for the Department of Medicine at Mount Sinai, and is pursuing a fellowship in Gastroenterology with research aspirations in the area of gastrointestinal malignancies and signaling in the tumor microenvironment. Dr. Hernandez is planning a future career in academic medicine, focused on both research and clinical care.


Nili Sommovilla, MD, is a Philadelphia native and received her undergraduate degree from the University of Pennsylvania where she studied both Biology and the History and Sociology of Science. After college, she spent time teaching abroad and also ran an educational outreach program in basic science research at the University of California-San Francisco. She stayed at UCSF to complete her medical degree before returning to the east coast for residency. While initially attracted to medicine in part by a love of basic science, she has since developed a keen interest in health care delivery and qualify of patient care while also maintaining a strong passion for education. These interests were nurtured through participation in the health care leadership track within the categorical residency at Mount Sinai. Nili is pursuing a career in academic medicine as a hospitalist.


Peter A. Vasquez, MD, graduated from William Paterson University with a BS in Biology then completed his MD at Albert Einstein College of Medicine before joining the Mount Sinai Categorical Internal Medicine Program in 2012. He is currently one of the Chief Residents in the Department of Medicine and works with faculty to enhance diversity within the Department and promote education amongst faculty and housestaff. Peter will be pursing a career in academic medicine in Primary Care.

Contact Us

Tereza Vukel
Residency Coordinator
Tel: 212-241-6609
One Gustave L. Levy Place
Box 1118
New York, NY 10029