LOCAL HEALTHCARE PROVIDERS
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42 providers
Availability last updated 04/25/2025
Robert Sable, MD
Gastroenterologist
3765 Riverdale Ave
Suite 7
Bronx, NY 10463
Jeffery Novak, MD, FACG, is a gastroenterologist and partner at Gastrointestinal Specialists of Long Island (GISLI) located in Wantagh and Malverne, New York. He is also a founding member of the Endoscopy Center of Long Island in Garden City, New York. He has been serving patients in the area since 1998.
Dr. Novak earned his Bachelor of Science in biology from Trinity College, where he was a member of Phi Beta Kappa and received several academic honors.
Dr. Novak attended medical school at the Albert Einstein College of Medicine, where he earned honors in gastroenterology, infectious disease, and other specialties.
After graduation, Dr. Novak completed his internship and residency in internal medicine at Mount Sinai Hospital in New York City. He then completed his fellowship in gastroenterology at Jackson Memorial Hospital Center in Miami, Florida.
Dr. Novak brings over 25 years of experience to his patients at Gastrointestinal Specialists of Long Island. He diagnoses and treats all gastrointestinal conditions, with his ultimate goal being to ensure that each patient feels comfortable and valued under his care.
Dr. Novak is a Diplomate of the American Board of Gastroenterology and the American Board of Internal Medicine. He is a member of the American College of Gastroenterology, the American Society of Gastrointestinal Endoscopy, the New York Society for Gastroenterology and Endoscopy, and the Nassau County Medical Society.
Dr. Jeffrey Novak
Specialist
306 Hempstead Ave
Malverne, NY 11565
Zachary Marwil, MD, is a highly respected and sought-after gastroenterologist on Long Island. Dr. Marwil is a partner at Gastrointestinal Specialists of Long Island (GISLI) and also serves as the managing director at the Northwell Health Endoscopy Center of Long Island. He is board-certified in both gastroenterology and internal medicine.
Dr. Marwil attended the University of Michigan as an undergraduate and earned his Doctor of Medicine from St. George’s University School of Medicine.
Dr. Marwil completed his residency in internal medicine at the State University of New York (SUNY) Downstate Medical Center, where he also had the honor of serving as the chief resident in the department of medicine. He continued his training as a fellow and then as chief fellow in the division of gastroenterology and hepatology at SUNY Downstate Medical Center.
Both during his post-graduate training and as an attending, Dr. Marwil has authored several research abstracts and journal articles. His findings have been published in peer-reviewed journals and presented at national meetings.
Having held several teaching positions, Dr. Marwil is currently on faculty as an Assistant Professor at the Zucker School of Medicine at Hofstra. He is a member of the American College of Gastroenterology, the American Society of Gastrointestinal Endoscopy, and the New York Society for Gastroenterology and Endoscopy.
Dr. Marwil takes great pride in offering state-of-the-art gastroenterology care for people of all ages and strives to treat each patient with the care and empathy they deserve. When not in the office, Dr. Marwil stays active through mountain biking, skiing, golf, and tennis. He mostly enjoys spending time with his wife and two daughters.
Dr. Zachary Marwil
Gastroenterologist
306 Hempstead Ave
Malverne, NY 11565
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I practice traditional Mt. Sinai trained medicine, with a great appreciation for Integrative and alternative approaches. I look for the latest high-tech approaches including genetic testing, neurocognitive screening, and testing with ‘liquid biopsies’ by a blood test that picks up very early cancers.
I am very open to questions, and I have many years of extensive relationships with excellent subspecialists in various hospitals around the city.
With Elsa, my amazingly competent ‘right hand’, I am available by text when you have a sudden medical concern, when you need lab or X-ray results quickly, a medication refill, an appointment or timing issue, a Covid or booster question, or a question about medication in the news that might pertain to your health.
Elsa Manelli is the heart and soul of the concierge practice. Primary contact person and office manager. Elsa receives and responds to texts and calls reliably, compassionately, and supports me, Stacy, and my patients in a caring and timely fashion. She has trained Allison and Cintia, my office staff, to be equally caring and responsive. Treat them all well, please!
I want to work with patients who appreciate collaboration! ‘You and me versus the issue at hand’.
And I am fortunate to work alongside a wonderful physician assistant with 15 years of experience named Stacy Beaupre who is very involved in integrative care and will be helping me evaluate neurocognitive function. She too is available and on-call.
I can only take a limited number of new concierge patients and I welcome a scheduled five-minute phone conversation where we can see if we are a good fit for one another.
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Dr. Bruce Yaffe, MD
General Practice Physician
985 5th Avenue and 79th Street
Ground Floor
New York , NY 10075
