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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. Jeremy Gutwein was born in Bronx, NY, and grew up in Westchester county. He received his Bachelor of Arts from New York University, Magna Cum Laude with Honors in Psychology in 1998. He received his medical degree from the Albert Einstein College of Medicine in 2002 and completed his internship and residency training in Internal Medicine at Montefiore Medical Center. He then earned a Master of Science degree in Nutrition at New York University in 2006 and went on to receive his training in Gastroenterology, which he completed in 2009, at Montefiore Medical Center. He joined Riverdale Gastroenterology and Liver Diseases immediately following his fellowship training. 

Dr. Gutwein is certified by the American Board of Internal Medicine in Gastroenterology. He is a member of the American College of Gastroenterology, the American Gastroenterological Association, the New York Society of Gastroenterology and Endoscopy, and the American Society for Gastrointestinal Endoscopy. 

Dr. Gutwein is on the medical staff of Montefiore Medical Center. 

Dr. Gutwein lives in Manhattan with his girlfriend, Vivien and his Olde English Bulldogge, Frank. He enjoys Astronomy, physics, comedy and hiking.

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.

Faisal Sheikh, DO is a Gastroenterology specialist in Syosset, New York. Dr. Sheikh is affiliated with Northwell Health and multiple hospitals in the area. He received his medical degree from New York College of Osteopathic Medicine.

After graduating, Dr. Sheikh completed his residency at North Shore University Hospital in Manhasset, New York. He then went on to become double board-certified in Internal Medicine and Gastroenterology.

Dr. Sheikh joined Long Island Gastro in 2014 and has been serving the Syosset community ever since. He is fluent in both English and Urdu.

In his free time away from the practice, Dr. Sheikh enjoys spending time with his family.

Sejal Lauro, MS, RPA-C, is a board-certified physician assistant at Stoneleigh Primary Care, which has locations in Brewster, Jefferson Valley, Pawling, and Yorktown Heights, New York. She has over twenty years of health care experience and is proud to provide compassionate medical care to her patients.

Sejal earned her master’s degree in physician assistant studies, specializing in internal medicine, from the University of Nebraska, Omaha. She is nutritarian certified in plant-based nutrition, which allows her to serve a broad patient population. Sejal is also certified in performing nonsurgical cosmetic procedures and is well-known for her attention to detail and precise skills in this area.

At Stoneleigh Primary Care, Sejal takes time to get to know her patients and answer any questions they have. She ensures they feel comfortable and seeks to help them understand their condition. She is thrilled to welcome new patients to Stoneleigh Primary Care.

To schedule an appointment with Sejal or another member of the team, call Stoneleigh Primary Care or request an appointment online today.

Dr. Christopher Chum, a board-certified Gastroenterologist, is deeply committed to enhancing the health and well-being of his community. Having earned his medical degree from the NYIT College of Osteopathic Medicine, Dr. Chum completed his residency at Coney Island Hospital, followed by a fellowship in General and Advanced Gastroenterology at the same institution. There, he served as Assistant Program Director and Director of Advanced Endoscopy for a prominent academic program dedicated to training the next generation of gastroenterologists and medical residents.

Renowned for his compassionate and patient-centered approach, Dr. Chum has consistently delivered cutting-edge care to a diverse patient population, including underserved communities.

While maintaining his academic affiliations at Coney Island Hospital, he has relocated to New Jersey with his family. Here, he extends his expertise to the Hamilton community, providing exceptional care and improving access to healthcare for all.

Dr. Chum specializes in advanced interventional endoscopy and offers comprehensive care across the spectrum of gastroenterology and hepatology. His clinical interests encompass biliary and pancreatic disorders, cancer prevention, gastrointestinal oncology, and the burgeoning fields of fatty liver disease, obesity, with non-surgical medical and endoscopic weight loss options.

Please note that Maniya Health Medical Group does not employ or in any way supervise Dr. Christopher Chum, DO. He is employed by Hamilton Gastroenterology. Patients should contact Hamilton GI's offices directly for all questions concerning their GI treatment.

Christopher Tomaino, MD, a board-certified gastroenterologist at East Coast Gastroenterology and Endoscopy, offers comprehensive care for a variety of gastrointestinal symptoms and disorders. Located in Patchogue, New York, the practice has the latest advancements in diagnostic testing to quickly find the root cause of symptoms like abdominal pain, bloating, persistent diarrhea, and chronic constipation. 

Earning his medical degree from the American University of the Caribbean School of Medicine in  St. Maarten, Dr. Tomaino went on to complete his residency and fellowship in both internal medicine and gastroenterology at the Icahn School of Medicine at Mount Sinai, Elmhurst New York. He is board-certified in both internal medicine and gastroenterology by the American Board of Internal Medicine. 

Dr. Tomaino specializes in creating customized treatment plans to address individual patient needs and uses the latest technologies to perform colonoscopy and upper endoscopy. In addition to diagnosing the cause of unexplained symptoms, Dr. Tomaino can address acute and chronic gastrointestinal disorders like acid reflux, Crohn’s disease, ulcerative colitis, and diverticulitis. 

East Coast Gastroenterology and Endoscopy also offers comprehensive services to treat painful hemorrhoids using minimally invasive techniques. Dr. Tomaino can also diagnose all stages of liver disease. He customizes a treatment plan to manage the condition in the long-term and reduce risk factors for complications like liver failure.

To learn more about the available diagnostic technologies and treatment options available for gastrointestinal conditions, call East Coast Gastroenterology and Endoscopy to schedule an appointment or book one online today.

Dr. Christopher Chum, a board-certified Gastroenterologist, is deeply committed to enhancing the health and well-being of his community. Having earned his medical degree from the NYIT College of Osteopathic Medicine, Dr. Chum completed his residency at Coney Island Hospital, followed by a fellowship in General and Advanced Gastroenterology at the same institution. There, he served as Assistant Program Director and Director of Advanced Endoscopy for a prominent academic program dedicated to training the next generation of gastroenterologists and medical residents.

Renowned for his compassionate and patient-centered approach, Dr. Chum has consistently delivered cutting-edge care to a diverse patient population, including underserved communities.

While maintaining his academic affiliations at Coney Island Hospital, he has relocated to New Jersey with his family. Here, he extends his expertise to the Hamilton community, providing exceptional care and improving access to healthcare for all.

Dr. Chum specializes in advanced interventional endoscopy and offers comprehensive care across the spectrum of gastroenterology and hepatology. His clinical interests encompass biliary and pancreatic disorders, cancer prevention, gastrointestinal oncology, and the burgeoning fields of fatty liver disease, obesity, with non-surgical medical and endoscopic weight loss options.

Please note that Maniya Health Medical Group does not employ or in any way supervise Dr. Christopher Chum, DO. He is employed by Hamilton Gastroenterology. Patients should contact Hamilton GI's offices directly for all questions concerning their GI treatment.

Zafar Zamir, MD, FACG, AGAF is a Board-Certified Gastroenterologist who has been caring for the Hamilton community for decades. He earned his Medical Degree from Dow Medical College in Pakistan, and completed his Residency Training at Cook County Hospital in Chicago and Fellowship in Gastroenterology from the Medical College of Wisconsin.

Dr. Zamir has a particular interest in IBS and General Gastroenterology, including hemorrhoids and other ano-rectal disorders. Dr. Zamir has held a variety of leadership roles in the local community, including as a Clinical Assistant Professor at Rutgers RWJ Medical School and as President of the Medical Staff at RWJ University Hospital Hamilton.

Please note that Maniya Health Medical Group does not employ or in any way supervise Dr. Zafar Zamir, MD. He is employed by Hamilton Gastroenterology. Patients should contact Hamilton GI's offices directly for all questions concerning their GI treatment.

Dr. Christopher Chum, a board-certified Gastroenterologist, is deeply committed to enhancing the health and well-being of his community. Having earned his medical degree from the NYIT College of Osteopathic Medicine, Dr. Chum completed his residency at Coney Island Hospital, followed by a fellowship in General and Advanced Gastroenterology at the same institution. There, he served as Assistant Program Director and Director of Advanced Endoscopy for a prominent academic program dedicated to training the next generation of gastroenterologists and medical residents.

Renowned for his compassionate and patient-centered approach, Dr. Chum has consistently delivered cutting-edge care to a diverse patient population, including underserved communities.

While maintaining his academic affiliations at Coney Island Hospital, he has relocated to New Jersey with his family. Here, he extends his expertise to the Hamilton community, providing exceptional care and improving access to healthcare for all.

Dr. Chum specializes in advanced interventional endoscopy and offers comprehensive care across the spectrum of gastroenterology and hepatology. His clinical interests encompass biliary and pancreatic disorders, cancer prevention, gastrointestinal oncology, and the burgeoning fields of fatty liver disease, obesity, with non-surgical medical and endoscopic weight loss options.

Please note that Maniya Health Medical Group does not employ or in any way supervise Dr. Christopher Chum, DO. He is employed by Hamilton Gastroenterology. Patients should contact Hamilton GI's offices directly for all questions concerning their GI treatment.