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28 providers
Availability last updated 04/04/2026
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.
Dr. Arthur Walczyk, MD
Gastroenterologist
400 Westage Business Ctr Dr
Suite 209
Fishkill, NY 12524
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.
Dr. Paul Burrows, md
Gastroenterologist
400 Westage Business Ctr Dr
Suite 209
Fishkill, NY 12524
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. Ravi Hotchandani, MD
Gastroenterologist
400 Westage Business Ctr Dr
Suite 209
Fishkill, NY 12524
QualCare is a leader in primary care. With convenient locations in Fishkill and Poughkeepsie, New York, the team of primary care specialists leverages extensive expertise, advanced technology, and state-of-the-art equipment to provide patients with the high-quality care they deserve.
The team cares for adolescents and adults in all stages of life. From preventive care to sick visits, they deliver patient-centered care that supports healthy aging.
The team offers same-day visits and effective diagnostic tools to prevent mild health concerns from evolving into life-threatening conditions. Patients can take advantage of responsive treatment when they need it most.
Meeting every patient’s unique health care needs is a top priority at QualCare. Along with comprehensive annual physicals, the team performs vaccinations, testing and treatment for allergies, and chronic disease management for conditions like diabetes, hypertension, and high cholesterol.
QualCare proudly provides thorough care and treatment under one roof. Call or schedule an appointment online today to meet with an experienced primary care specialist.
Michael Steckman, MD
Gastroenterologist
400 Westage Business Center Drive
Suite 209
Fishkill, NY 12525
David Stein, MD
Gastroenterologist
3765 Riverdale Ave
Suite 7
Bronx, NY 10463
Robert Sable, MD
Gastroenterologist
3765 Riverdale Ave
Suite 7
Bronx, NY 10463
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, MD
Gastroenterologist
306 Hempstead Ave
Malverne, NY 11565
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, MD
Specialist
306 Hempstead Ave
Malverne, NY 11565
