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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.

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. Anthony Ng, M.D., is a leading gastroenterologist dedicated to providing state-of-the-art care to patients from Brooklyn, New York to Lower Manhattan, New York, and throughout the Greater New York City metro region. As the founding physician of GI Health, Dr. Ng offers a comprehensive array of diagnostic and treatment options for patients with issues affecting the gastrointestinal system, including chronic and acute stomach pain, colon cancer, hemorrhoids, and acid reflux, using the most advanced techniques for colonoscopy, upper endoscopy and wireless capsule endoscopy using the PillCam system. Dr. Ng also provides non-invasive screening for colorectal cancer with stool testing including the ground-breaking Cologuard fecal DNA test. In addition, he offers medical weight loss programs customized for the needs of the individual patient for optimal long-term results.

After receiving his medical degree, Dr. Ng completed his training in internal medicine at The Beth Israel Deaconess Hospital in Boston, one of the three major Harvard teaching hospitals, followed by a residency in gastroenterology at The Mount Sinai Hospital in New York City. In addition to caring for patients at his practice, Dr. Ng is also a clinical instructor of medicine at both New York Presbyterian Hospital - Weill Cornell Medical Center and Mount Sinai - Beth Israel Hospital, both top-ranked medical centers in New York City.

At GI Health, Dr. Ng welcomes the opportunity to provide skilled, compassionate, patient-centered care for men and women from throughout New York City.

Dr. Steven Guttmann, MD is board certified in Internal Medicine and Gastroenterology. He received his BA in psychology from Brooklyn College/CUNY and went on to receive his medical degree from Sackler University. Steven completed his medical residency at Maimonides Medical Center in Brooklyn. After serving as Chief Medical Resident he completed his Gastroenterology Fellowship at Maimonides Medical Center.

Following fellowship, Dr. Guttmann served as a staff attending at Forest Hill-Long Island Jewish Hospital as well as the Director of Endoscopy. He subsequently went on to run a busy inpatient gastroenterology service at Long Island Jewish and North Shore University Hospitals/Northwell.

Dr. Guttmann is an Assistant Professor of Medicine at Hofstra University Medical School and has numerous national publications and presentations on gastrointestinal topics. His interests include general luminal gastroenterology, inflammatory bowel disease, hepato-pancreaticobiliary disease, and therapeutic GI.

Dr. Guttmann is driven by the bonds he builds with his patients, working together with them to achieve a healthy life. 

The Heart Center of the Oranges, PA, is a medical practice with multiple locations: West Orange, East Orange, South Orange, Maplewood, Newark, Belleville, and Bloomfield, New Jersey. Led by a skilled team of physicians, nurses, and other medical professionals, the practice serves people aged 20 and older in person and virtually via telemedicine.

The Heart Center of the Oranges, PA, offers specialty services, including cardiology, endocrinology, gynecology, internal medicine, neurology, podiatry, pulmonology, women’s wellness, pediatric endocrinology, nutrition, and sleep medicine. Patients with chronic diseases or general medicine concerns can turn to the highly trained experts at The Heart Center of the Oranges, PA, for superior care.

The skilled medical team personalizes each treatment plan based on a patient’s medical needs, lifestyle, and desired outcomes.

Those with diabetes, foot or ankle issues, gynecology concerns, or heart, kidney, or lung diseases rely on The Heart Center of the Oranges, PA, for exceptional care in a welcoming setting. Undergoing routine care reduces the risk of bothersome symptoms and severe medical complications. 

The Heart Center of the Oranges, PA, team is friendly, providing top-notch patient-centered care using the latest advances in technology and research-backed treatments. They compassionately welcome new and existing patients to the practice.

Schedule an in-person or telehealth appointment at The Heart Center of the Oranges, PA, by phone or online today.

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.

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.

The Heart Center of the Oranges, PA, is a medical practice with multiple locations: West Orange, East Orange, South Orange, Maplewood, Newark, Belleville, and Bloomfield, New Jersey. Led by a skilled team of physicians, nurses, and other medical professionals, the practice serves people aged 20 and older in person and virtually via telemedicine.

The Heart Center of the Oranges, PA, offers specialty services, including cardiology, endocrinology, gynecology, internal medicine, neurology, podiatry, pulmonology, women’s wellness, pediatric endocrinology, nutrition, and sleep medicine. Patients with chronic diseases or general medicine concerns can turn to the highly trained experts at The Heart Center of the Oranges, PA, for superior care.

The skilled medical team personalizes each treatment plan based on a patient’s medical needs, lifestyle, and desired outcomes.

Those with diabetes, foot or ankle issues, gynecology concerns, or heart, kidney, or lung diseases rely on The Heart Center of the Oranges, PA, for exceptional care in a welcoming setting. Undergoing routine care reduces the risk of bothersome symptoms and severe medical complications. 

The Heart Center of the Oranges, PA, team is friendly, providing top-notch patient-centered care using the latest advances in technology and research-backed treatments. They compassionately welcome new and existing patients to the practice.

Schedule an in-person or telehealth appointment at The Heart Center of the Oranges, PA, by phone or online today.

Dr. Steven Guttmann, MD is board certified in Internal Medicine and Gastroenterology. He received his BA in psychology from Brooklyn College/CUNY and went on to receive his medical degree from Sackler University. Steven completed his medical residency at Maimonides Medical Center in Brooklyn. After serving as Chief Medical Resident he completed his Gastroenterology Fellowship at Maimonides Medical Center.

Following fellowship, Dr. Guttmann served as a staff attending at Forest Hill-Long Island Jewish Hospital as well as the Director of Endoscopy. He subsequently went on to run a busy inpatient gastroenterology service at Long Island Jewish and North Shore University Hospitals/Northwell.

Dr. Guttmann is an Assistant Professor of Medicine at Hofstra University Medical School and has numerous national publications and presentations on gastrointestinal topics. His interests include general luminal gastroenterology, inflammatory bowel disease, hepato-pancreaticobiliary disease, and therapeutic GI.

Dr. Guttmann is driven by the bonds he builds with his patients, working together with them to achieve a healthy life. 

Dr. Anthony Ng, M.D., is a leading gastroenterologist dedicated to providing state-of-the-art care to patients from Brooklyn, New York to Lower Manhattan, New York, and throughout the Greater New York City metro region. As the founding physician of GI Health, Dr. Ng offers a comprehensive array of diagnostic and treatment options for patients with issues affecting the gastrointestinal system, including chronic and acute stomach pain, colon cancer, hemorrhoids, and acid reflux, using the most advanced techniques for colonoscopy, upper endoscopy and wireless capsule endoscopy using the PillCam system. Dr. Ng also provides non-invasive screening for colorectal cancer with stool testing including the ground-breaking Cologuard fecal DNA test. In addition, he offers medical weight loss programs customized for the needs of the individual patient for optimal long-term results.

After receiving his medical degree, Dr. Ng completed his training in internal medicine at The Beth Israel Deaconess Hospital in Boston, one of the three major Harvard teaching hospitals, followed by a residency in gastroenterology at The Mount Sinai Hospital in New York City. In addition to caring for patients at his practice, Dr. Ng is also a clinical instructor of medicine at both New York Presbyterian Hospital - Weill Cornell Medical Center and Mount Sinai - Beth Israel Hospital, both top-ranked medical centers in New York City.

At GI Health, Dr. Ng welcomes the opportunity to provide skilled, compassionate, patient-centered care for men and women from throughout New York City.

The Heart Center of the Oranges, PA, is a medical practice with multiple locations: West Orange, East Orange, South Orange, Maplewood, Newark, Belleville, and Bloomfield, New Jersey. Led by a skilled team of physicians, nurses, and other medical professionals, the practice serves people aged 20 and older in person and virtually via telemedicine.

The Heart Center of the Oranges, PA, offers specialty services, including cardiology, endocrinology, gynecology, internal medicine, neurology, podiatry, pulmonology, women’s wellness, pediatric endocrinology, nutrition, and sleep medicine. Patients with chronic diseases or general medicine concerns can turn to the highly trained experts at The Heart Center of the Oranges, PA, for superior care.

The skilled medical team personalizes each treatment plan based on a patient’s medical needs, lifestyle, and desired outcomes.

Those with diabetes, foot or ankle issues, gynecology concerns, or heart, kidney, or lung diseases rely on The Heart Center of the Oranges, PA, for exceptional care in a welcoming setting. Undergoing routine care reduces the risk of bothersome symptoms and severe medical complications. 

The Heart Center of the Oranges, PA, team is friendly, providing top-notch patient-centered care using the latest advances in technology and research-backed treatments. They compassionately welcome new and existing patients to the practice.

Schedule an in-person or telehealth appointment at The Heart Center of the Oranges, PA, by phone or online today.

The Heart Center of the Oranges, PA, is a medical practice with multiple locations: West Orange, East Orange, South Orange, Maplewood, Newark, Belleville, and Bloomfield, New Jersey. Led by a skilled team of physicians, nurses, and other medical professionals, the practice serves people aged 20 and older in person and virtually via telemedicine.

The Heart Center of the Oranges, PA, offers specialty services, including cardiology, endocrinology, gynecology, internal medicine, neurology, podiatry, pulmonology, women’s wellness, pediatric endocrinology, nutrition, and sleep medicine. Patients with chronic diseases or general medicine concerns can turn to the highly trained experts at The Heart Center of the Oranges, PA, for superior care.

The skilled medical team personalizes each treatment plan based on a patient’s medical needs, lifestyle, and desired outcomes.

Those with diabetes, foot or ankle issues, gynecology concerns, or heart, kidney, or lung diseases rely on The Heart Center of the Oranges, PA, for exceptional care in a welcoming setting. Undergoing routine care reduces the risk of bothersome symptoms and severe medical complications. 

The Heart Center of the Oranges, PA, team is friendly, providing top-notch patient-centered care using the latest advances in technology and research-backed treatments. They compassionately welcome new and existing patients to the practice.

Schedule an in-person or telehealth appointment at The Heart Center of the Oranges, PA, by phone or online today.