Internal Medicine Residency Directors & Chief Residents | NYU Langone Health

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Internal Medicine Residency Internal Medicine Residency Directors & Chief Residents

Internal Medicine Residency Directors & Chief Residents

Residency program directors in NYU Langone’s Department of Medicine develop, oversee, and improve the Internal Medicine Residency with assistance from chief residents. Together, they ensure that both residents and faculty are equally represented in the decisions that shape the Internal Medicine Residency curriculum.

Our Leadership

The Internal Medicine Residency program directors provide residents with career development advice and guidance and establish fair processes for all who are involved to participate in determining the program’s goals and expectations.

Program Directors

Patrick M. Cocks, MD

Director, Internal Medicine Residency

Margaret R. Horlick, MD, MHPE

Senior Associate Director, Internal Medicine Residency

Jennifer G. Adams, MD

Associate Director, Primary Care Track

Anthony Andriotis, MD

Associate Director, Internal Medicine Residency

Richard E. Greene, MD, MHPE

Associate Director, Primary Care Track

Kevin D. Hauck, MD, MPH

Associate Director, NYU Langone Categorical Medicine Track

Rachael W. Hayes, MD

Residency Program Director, Family Health Centers at Nyu Langone

Gregory Katz, MD

Associate Director, Internal Medicine Residency, Inpatient Site Director, NYU Langone’s Tisch Hospital

Karin A. Katz, MD

Associate Director, Internal Medicine Residency

Barbara Porter, MD, MPH

Associate Director, Internal Medicine Residency

Daniel Sartori, MD

Associate Director, Community Health Track

Neil M. Shapiro, MD

Associate Director, Internal Medicine Residency

Site Directors

Kelly J. Crotty, MD, MPH

Outpatient Site Director, VA NY Harbor Health Care System

Sarah J. Moore, MD

Outpatient Site Director, NYC Health + Hospitals/Bellevue

Hadas Reich, MD

Outpatient Site Director, NYC Health + Hospitals/Gouverneur

N. Caroline Srisarajivakul-Klein, MD

Inpatient Site Director, NYC Health + Hospitals/Bellevue

Seagram M. Villagomez, MD

Inpatient Site Director, VA NY Harbor Health Care System

2022–23 Chief Residents

Selected for their exceptional clinical and leadership skills, chief residents serve as key mentors and advocates for other residents while supporting and upholding NYU Langone’s trifold mission to serve, teach, and discover.


Brandon Adelson, MD

Chief Resident, Outpatient, NYC Health + Hospitals/Bellevue

Brandon grew up in Montreal, Canada. He attended college at NYU, where he majored in economics. He went to medical school at SUNY Downstate College of Medicine in Brooklyn.

He was drawn to NYU Langone and Bellevue because of its diversity of training settings and the privilege of caring for undeserved and vulnerable patient populations. Brandon is excited to stay on as the Bellevue outpatient chief resident, where he hopes to continue to develop his skills as a teacher and leader and continue to develop meaningful relationships with his patients and wonderful colleagues.

When he’s not in the hospital, you can find Brandon at a workout class, Broadway show, eating pizza, and desperately searching for a golf course and golf buddies to fix that wicked slice.


Melissa Chiang, MD

Chief Resident, Primary Care

Melissa grew up in Freehold, New Jersey, and completed her undergraduate training at Columbia University, where she graduated magna cum laude with a major in neuroscience and behavior. After taking a gap year to work at Health Leads, a nonprofit organization aimed at addressing systemic barriers to health and decreasing inequity in medicine, she attended Columbia University’s College of Physicians and Surgeons for medical school. While there, her love of primary care grew through her involvement with the Daniel Noyes Brown Primary Care Scholars program and the Columbia-Harlem Homeless Medical Partnership, a student-run free clinic that provides primary care services to the homeless and uninsured community of West Harlem.

Knowing that she wanted to stay in New York City for residency, Melissa felt that there was no better place to continue her primary care training than at NYU Grossman School of Medicine, where she was drawn to the variety of clinical training sites, Bellevue’s service-driven mission, and the down-to-earth residents and faculty. She has found that the primary care residency track has provided a wonderful home base through the rigors of medical training and is delighted to be staying on as primary care chief resident this year.

In her free time, Melissa enjoys listening to Broadway musical cast recordings, 90s boy band music, and audio fiction podcasts, attending trivia nights and playing board games, and watching English Premier League soccer.


Mary Guan, MD

Resident, Inpatient Hospitalist, NYU Langone Hospital—Brooklyn

Mary grew up in Ithaca, New York, and attended the Massachusetts Institute of Technology where she majored in biology. During college she worked with low-income families at Boston Medical Center, which ignited her desire to work with underserved populations.

She completed an MD at the University of Michigan in Ann Arbor and pursued a Howard Hughes Medical Institute research fellowship in oncology. Mary wanted to return to the east coast for residency training and in particular New York City. She chose NYU Grossman School of Medicine for its diverse and particularly vulnerable patient population, as well as the ability to use her Mandarin skills on a day-to-day basis with the patients she cares for.

Mary is looking forward to staying on for another year as an inpatient hospitalist chief at NYU Langone Hospital—Brooklyn and developing her clinical educator skills while serving as a mentor for fellow residents.

During her free time, she enjoys listening to music and DJing on the side, tending to her plants, and reading fiction and poetry.


Ranger Guillory, MD

Chief Resident, Inpatient, VA New York Harbor Healthcare System

Ranger was born and raised in Arkansas. He attended undergrad at the University of Arkansas, where he completed a Biochemistry degree with a minor in business. He attended medical school at the University of Arkansas for Medical Sciences. During medical school, he developed an interest in healthcare disparities and underserved patient populations while volunteering at his medical school’s free and student-run community outreach clinic.

Ranger chose NYU Grossman School of Medicine for residency for many reasons, but the opportunity to serve the patient population at Bellevue was one of the biggest factors for his choice. He found that the residency experience here provided strong clinical training across the program’s several diverse hospital systems. Since starting residency, his favorite part of the program has been the opportunity to work alongside a wonderful group of friends, co-residents, and colleagues.

During his free time, you’ll find Ranger out dancing with friends, cuddling with his dog, Citi biking around the city, and enjoying the many perks that living in New York City has to offer.


Amit Jhaveri, MD

Executive Chief Resident, NYC Health + Hospitals/Bellevue

Amit was born and raised in the small town of Massena located in upstate New York (as far north as you can go!). He attended the University of Rochester where he majored in religion and biology. He later moved down the road to attend the Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo for medical school. While there, other than rooting for the Buffalo Bills, he developed an interest in community health and working with vulnerable patient populations while serving as a manager for the student-run Lighthouse Free Medical Clinic. He was also selected as a Stanley Sarnoff Research Fellow, where he spent a formative year in a lab studying mechanisms of vascular calcification.

While on the interview trail, Amit was interested in finding a residency program that was committed to service and research, and had a close-knit community of residents. NYU Langone checked every box, and he couldn’t be happier with his choice. Between the cutting-edge research and resources, the strong social mission of Bellevue, and the diversity of patients between three hospital sites, NYU Langone has been an incredible place to learn medicine, and he is thrilled to serve as chief resident for Bellevue next year.

When not in the hospital, Amit can be found attempting to lift weights at the gym, reading a political or presidential biography, or visiting random historical sites of New York City.


Vickie Kassapidis, DO

Chief Resident, Outpatient, Family Health Centers at NYU Langone

Vickie was born and raised in Astoria, Queens. She stayed close to home for college, graduating from Barnard College in New York as a comparative literature major with a focus on modern Greek and English poetry translation. Before attending medical school, she completed a master’s in biomedical sciences at Tufts University School of Medicine in Boston, Massachusetts. She made her way back to New York and attended NYIT College of Osteopathic Medicine in Old Westbury, where she developed her interest in a holistic approach to medicine.

Vickie chose NYU Grossman School of Medicine’s community health residency track for its patient population, intimate community, and its unique coupling with a large academic institution just a short ferry ride away. Expanding on her prior work on Columbia's newspaper, The Daily Spectator, she has worked closely in Core IM to help curate internal medicine content for virtual medical education. Following chief year, Vickie plans to pursue fellowship training in pulmonary and critical care medicine. As the outpatient chief resident at NYU Langone Hospital—Brooklyn, Vickie is excited to nurture a lifelong love of learning in interns and residents and is thrilled to work on the outpatient curriculum.

Outside of the hospital, Vickie loves to cook and enjoys eating her way through all five boroughs. She is also a devoted Peloton member and can’t get enough of the Bike Bootcamps.


Saif Laljee, MD

Chief Resident, Inpatient, NYU Langone’s Tisch Hospital and Kimmel Pavilion

Saif was born in India near the beaches of Goa, and soon after moved to the United States with his parents. He grew up on Long Island and attended Stony Brook University where he earned a degree in biochemistry. It was there that Saif discovered his passion for teaching and developed an interest in medicine.

Ultimately, he attended medical school at NYU Grossman School of Medicine, falling in love with New York City—its people, food, and culture. He chose to continue residency training at NYU Langone and Bellevue because of the strong sense of community among its residents, and the opportunity to serve some of the city’s most vulnerable and at-risk patients.

He is incredibly excited to stay on as an inpatient chief resident, wanting to focus on leadership, education, and supporting residents during their training. He hopes to use this year to delve deeper in his role as an educator and leader, and ultimately continue a career in academic medicine.

Outside of the hospital, you can find Saif exploring the restaurant scene in New York City—trying new cuisines and dining experiences.


Sarah Leventhal, MD

Executive Chief Resident, Inpatient, NYU Langone’s Tisch Hospital and Kimmel Pavilion

Sarah grew up in a small town outside of Philadelphia and attended the University of Pennsylvania, where she studied molecular biology and American Sign Language. She then went to NYU Grossman School of Medicine, where she worked as a peer mentor and Practice of Medicine instructor, and graduated with honors in research studying diabetic wound healing.

She knew she wanted to stay at NYU Grossman School of Medicine for residency for the opportunity to train at three unique clinical sites while serving a diverse patient population with a group of close-knit co-residents. During residency, Sarah studied sex differences in diabetic cardiovascular outcomes, and continued her work as a Practice of Medicine instructor. She is excited to foster her passion for teaching as inpatient chief resident at NYU Langone’s Tisch Hospital and Kimmel Pavilion.

In her free time, Sarah can be found painting, singing along to Broadway soundtracks, and trying new recipes with her fiancé, who is a general surgery resident at NYU Grossman School of Medicine.


Patrick Li, MD

Chief Resident, Inpatient, NYU Langone Hospital—Brooklyn

Patrick was born in Xian, China, before bouncing along the East Coast until settling in Boston, which he calls home. He earned a BA in psychology at Harvard University. After graduating from college, Patrick moved to Johannesburg, South Africa, to found an education and sports nonprofit—the ASSIST.

Patrick moved back stateside to pursue his MD at the University of Michigan Medical School (Go Blue!). While at Michigan, Patrick was introduced to medical devices and healthcare technology. He hopes to combine this interest in technology and his commitment to serving underserved populations in the future.

Returning to his East Coast roots, Patrick chose NYU Grossman School of Medicine for residency because of the strong camaraderie among its residents and the diverse patient population it serves. Patrick is excited to continue as an inpatient chief resident at NYU Langone Hospital—Brooklyn, where he looks forward to deepening his abilities to mentor and teach fellow residents.

When he’s not in the hospital, Patrick can be found perfecting his jump shot on the local basketball court, listening to podcasts, and exploring New York City’s finest pizza establishments.


Jeremy Lin, MD

Chief Resident, Hospitalist, NYU Langone Hospital—Brooklyn

Jeremy grew up in suburban New Jersey, and attended Lehigh University where he graduated with a degree in chemistry. He was interested in experiencing the city life for medical school at SUNY Downstate College of Medicine in Brooklyn.

Jeremy was drawn to NYU Grossman School of Medicine’s community health track for the opportunity to continue to train in Brooklyn at a strong residency program. He is excited for his year as a hospitalist chief resident to hone his skills before pursuing a career as an academic hospitalist.

Outside of the hospital, Jeremy enjoys exploring restaurants and happy hours. His free time is often spent playing video games with his friends or on movie night with his fiancé.


Daniel Markisello, MD

Chief Resident, Inpatient, NYC Health + Hospitals/Bellevue

Danny is originally from the small town of Wallkill, New York. He attended the State University of New York, University at Albany, for undergraduate, majoring in biology and chemistry. During this time, he became involved at the student organization and university level in a variety of curriculum and academic policy committees.

He then completed medical school at NYU Grossman School of Medicine, where he continued to explore his interest in education through an anatomy teaching fellowship, tutoring, bedside teaching session, and curriculum development. Danny was drawn to stay at NYU Grossman School of Medicine for residency by the welcoming, supportive, and collaborative community of residents and faculty he got to work with throughout medical school. The diversity of experiences across the program’s three hospitals was another major factor in his decision to stay here.

Danny is looking forward to serving as an inpatient chief resident where he hopes to further refine his skills as an educator and clinician in preparation for a career that he plans to focus around inpatient medicine and education.

While not at the hospital, Danny enjoys taking trips outside the city for hikes and golfing, board games, finding a quiet place to read outdoors in New York City, and exploring new restaurants with friends.


John Medamana, MD

Chief Resident, Outpatient, VA New York Harbor Healthcare System

John was born and raised in New Jersey. He attended Stony Brook University for undergraduate school where he graduated magna cum laude and as a member of Tau Beta Pi with a degree in biomedical engineering. During his undergraduate time, he was fortunate to have exposure to transcatheter aortic valve replacement (TAVR) as part of his capstone design project. He was pleased to stay at Stony Brook for medical school where he continued TAVR research and graduated as a member of Alpha Omega Alpha.

John was happy to continue his training at the NYU Grossman School of Medicine and has thoroughly enjoyed the diversity of patients and pathology encountered during training. John will serve as the outpatient chief resident at the VA NY Harbor Healthcare System. After his chief year, John plans to pursue a fellowship in cardiology.

When not at the hospital, John enjoys cycling, skiing, chopping wood, and spending time with friends and family.


Oliver Stewart, MD

Chief Resident, Health Equity, Inpatient, VA New York Harbor Healthcare System

Oliver was born in the Bronx, New York, but grew up in West Palm Beach, Florida. He completed his undergraduate studies at the University of Florida where he studied health science as a member of the Honors College. While attending the University of Florida, Oliver found an appreciation for the abundant nature in Gainesville and the surrounding areas while also developing a love for the camaraderie associated with attending Gator football games.

He returned to New York City to attend NYU Grossman School of Medicine as a medical student. During medical school, Oliver became captivated by the breadth of medical training offered across three unique hospital systems and the ability to provide top-notch medical care to our city’s most vulnerable patients regardless of immigration status, cultural background, or socioeconomic status. Consequently, his decision to remain at NYU Grossman School of Medicine for internal medicine residency training was a no-brainer. He is thrilled to stay on as health equity chief and looks forward to working with co-residents, faculty, and patients alike in order to promote health equity through curriculum development, research, education, and patient outreach.

Outside of the hospital, you can find Oliver exploring New York City restaurants with his fiancée, running along the East River, watching his favorite sports teams, or listening to a diverse array of podcasts.