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Arthur Walczyk, MD, FACG, is a board-certified gastroenterologist with the gastroenterology team at Northern Medical Group Gastroenterology Division, formerly known as The Digestive Disease Center of the Hudson Valley. He is dedicated to the treatment and prevention of diseases and disorders of the digestive tract to patients in Fishkill, Poughkeepsie, and Highland, New York. 

Dr. Walczyk is a known expert in performing colonoscopy, upper GI endoscopy (EGD), endoscopic ultrasound (EUS), endoscopic retrograde cholangiopancreatography (ERCP) and the removal of bile duct stones, and hemorrhoidal banding. He also specializes in treating biliary disease, ulcerative colitis, Crohn’s disease, and hepatitis C.

He earned his medical degree at St. George’s University School of Medicine in Grenada, West Indies. Dr. Walczyk then completed his residency training at LaGuardia Hospital (also known as North Shore University Hospital) in Forest Hills, New York. To further his training, Dr. Walczyk also pursued additional fellowships in gastroenterology at The Jamaica Hospital, an affiliate of Cornell University, in New York, and West Virginia University Hospital’s Robert Byrd Health Sciences Center in Morgantown, West Virginia.

Dr. Walczyk is highly regarded in the treatment of conditions, such as acid reflux disease (GERD), diverticulosis, lactose intolerance, Celiac disease, peptic ulcer disease, diarrhea, constipation, and colon cancer. He has admitting privileges at Mid-Hudson Regional Hospital and Vassar Brothers Medical Center in Poughkeepsie, New York, and Hudson Valley Endoscopy Center in Fishkill, New York. 

Dr. Walczyk is affiliated with the American Gastroenterology Association and Dutchess County Medical Society, and is a fellow of the American College of Gastroenterology.

Paul Burrows, MD, is a board-certified gastroenterologist at Northern Medical Group Gastroenterology Division, formerly known as The Digestive Disease Center of the Hudson Valley dedicated to the treatment and prevention of diseases and disorders of the digestive tract. At the practice’s locations in Fishkill, Poughkeepsie, and Highland, New York, Dr. Burrows offers his expertise in performing colonoscopies and upper GI endoscopy (EGD) procedures. 

Dr. Burrows received his medical degree at the Autonomous University of Guadalajara in Mexico and then completed his residency at Albany Medical College in Albany, New York. He then continued his training in gastroenterology at Faulkner Hospital, affiliated with Tufts University, in Boston, Massachusetts.

Dr. Burrows specializes in treating colon cancer, gastroesophageal reflux disease (GERD), irritable bowel syndrome, diverticulosis, food intolerances, Celiac disease, peptic ulcer disease, diarrhea, and constipation. He is fluent in Spanish as well.

He has admitting privileges at Mid-Hudson Regional Hospital, Vassar Brothers Medical Center, and Dutchess Ambulatory Surgical Center in Poughkeepsie, New York, and Hudson Valley Endoscopy Center in Fishkill, New York.

Ravi Hotchandani, MD, is a board-certified gastroenterologist at leading gastroenterology practice, Northern Medical Group Gastroenterology Division, formerly known as The Digestive Disease Center of the Hudson Valley, where he specializes in the treatment and prevention of diseases and disorders of the digestive tract. At the practice’s offices in Fishkill, Poughkeepsie, and Highland, New York, Dr. Hotchandani has expertise in performing colonoscopies, upper GI endoscopies (EGD), and biliary endoscopies (ERCP).

Dr. Hotchandani earned his medical degree at the All India Institute of Medical Sciences in New Delhi, India. He then completed his residency at The Jamaica Hospital, an affiliate of Cornell Medical Center, in Jamaica, New York. Afterward, Dr. Hotchandani rounded out his training with a fellowship in gastroenterology at Harlem Hospital Center, affiliated with Columbia University, in New York. 

Through his years of training and experience, Dr. Hotchandani offers expert treatment for a wide range of gastroenterology-related conditions, including colon cancer, gastroesophageal reflux disease (GERD), irritable bowel syndrome, diverticulosis, food intolerances, Celiac disease, peptic ulcer disease, diarrhea, and constipation. 

Dr. Hotchandani is affiliated with the American Gastroenterology Association, American Medical Association, New York Medical Society, and Dutchess County Medical Society. He has admitting privileges at Mid-Hudson Regional Hospital and Vassar Brother Medical Center in Poughkeepsie, New York, and Hudson Valley Endoscopy Center in Fishkill, New York.

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.

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.

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.

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.

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.