Cardiologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Chiropractor providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dentist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dermatologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Family Physician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
OB-GYN providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Ophthalmologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Orthopedic Surgeon providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Pediatrician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Physical Therapist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Podiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Psychiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Jack Brenner, MD, is a board-certified gastroenterologist who specializes in digestive and gastrointestinal disorders at Stoneleigh Medical Group in Jefferson Valley, New York. Dr. Brenner is thrilled to join the practice and help patients resolve their symptoms and achieve better health.
Dr. Brenner holds board certifications in internal medicine and gastroenterology through the American Board of Internal Medicine (ABIM) and American Board of Gastroenterology. He graduated from the University of Rome and received his residency training at a Veterans Administration Medical Center. Dr. Brenner also joined a fellowship through Mount Sinai Health System.
As a gastroenterologist with over 40 years of experience, Dr. Brenner believes that the best way to provide health care is listening intently to patients and allowing them to express their concerns openly and honestly. He takes an evidence-based approach to care, using proven methods and the latest techniques in gastroenterology to offer his patients top-quality care and treatment options at Stoneleigh Medical Group.
Sejal R. Lauro, MS, RPA-C, is a board-certified and licensed physician assistant with over twenty years of health care experience. She is proud to provide compassionate medical care to patients at Stoneleigh Medical Group's two locations in Pawling and Jefferson Valley, New York.
Sejal received her master’s degree in physician assistant studies with a specialization in internal medicine from the University of Nebraska, Omaha. She is nutritarian certified in plant-based nutrition, allowing her to serve a broad patient population. In addition, Sejal is certified in performing nonsurgical cosmetic procedures and is widely known for her attention to detail and fine-tuned skills in this area.
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 Medical Group.
Rajiv Perinbasekar MD, is a gastroenterologist at Westchester Putnam Gastroenterology. He is passionate about providing high quality and personalized care to patients living in Putnam and northern Westchester.
Dr. Perinbasekar received his medical degree from SUNY Downstate Health Sciences University. He completed his internship and residency in Internal Medicine at the University of Maryland Medical Center in Baltimore, Maryland. During his residency he received awards for his research in inflammatory bowel disease. He then completed his fellowship in Gastroenterology and Hepatology at Hofstra-Northwell at Northshore University Hospital and Long Island Jewish Medical Center, where he also served as Chief Fellow.
Dr. Perinbasekar is knowledgeable in the treatment of digestive diseases of the gastrointestinal system and the liver, including colorectal cancer screening, irritable bowel syndrome, inflammatory bowel disease, and chronic liver disease. He has a special interest in using new technologies to enhance patient care.
Dr. Perinbasekar is currently accepting new patients.
Lizabeth Fiedler, MD, is a board-certified gastroenterologist atWestchester Putnam Gastroenterology. She is committed to providing patients living in and around Carmel, New York, with high-quality, unparalleled care.
Dr. Fiedler received her medical degree from the Icahn School of Medicine at Mount Sinai in New York City, followed by a residency at the Mount Sinai Hospital. She later completed her gastroenterology fellowship at the Montefiore Medical Center, the university hospital for the Albert Einstein College of Medicine, in New York City.
Dr. Fiedler has been in practice for over twenty years, and her clinical expertise includes all gastroenterology conditions. She has specific interests in acid reflux disease, constipation, hepatitis C, irritable bowel syndrome, and ulcerative colitis. To serve a more diverse patient population, Dr. Fiedler is fluent in Spanish and English.
She is now accepting new patients and is excited to welcome them to Westchester Putnam Gastroenterology.
Sunil Gupta, MD, is a board-certified specialist in gastroenterology with more than 20 years of experience in medicine and GI healthcare. He is proud to provide personalized care to patients at Stoneleigh Medical Group, at two of their offices in Brewster, Jefferson Valley, and Westchester Putnam Gastroenterology, located in Carmel, New York.
He received his medical degree from the University College of Medical Sciences in Delhi, India. Following graduation, Dr. Gupta completed his residency and practiced medicine in England. He then went on to obtain his fellowship in gastroenterology at Montefiore Medical Center in New York City.
Throughout his career, Dr. Gupta has performed more than 40,000 endoscopic procedures and specializes in diagnosing and treating GI diseases including gastroesophageal reflux disease (GERD), ulcers, rectal bleeding, hemorrhoids, colitis, diverticulosis, polyps, GI cancers, as well as liver and pancreatic diseases.
Michael Kushner, MD, is a gastroenterologist atboth Stoneleigh Medical Group and Westchester Putnam Gastroenterology. He is dedicated to providing patients living in and around Carmel and Pawling, New York, with comprehensive, individualized care.
Dr. Kushner is a native of New York and received his medical degree at SUNY Downstate College of Medicine in Brooklyn in 1990. He completed his medical internship and residency at Montefiore Medical Center in the Bronx and then served as an emergency room physician there for one year. He completed his gastroenterology/liver disease fellowship at Temple University Hospital in Philadelphia, Pennsylvania, where he remained on staff as a teaching faculty member before entering private practice in 1997. He has been voted as one of the top gastroenterologists in the Hudson Valley since 2016.
He is currently accepting new patients and looks forward to welcoming them. To schedule an appointment with Dr. Kushner, call the office or book a one-on-one consultation online today.
Sunil Gupta, MD, is a board-certified specialist in gastroenterology with more than 20 years of experience in medicine and GI healthcare. He is proud to provide personalized care to patients at Stoneleigh Medical Group, at two of their offices in Brewster, Jefferson Valley, and Westchester Putnam Gastroenterology, located in Carmel, New York.
He received his medical degree from the University College of Medical Sciences in Delhi, India. Following graduation, Dr. Gupta completed his residency and practiced medicine in England. He then went on to obtain his fellowship in gastroenterology at Montefiore Medical Center in New York City.
Throughout his career, Dr. Gupta has performed more than 40,000 endoscopic procedures and specializes in diagnosing and treating GI diseases including gastroesophageal reflux disease (GERD), ulcers, rectal bleeding, hemorrhoids, colitis, diverticulosis, polyps, GI cancers, as well as liver and pancreatic diseases.
Daniel Reich, MD, is a board-certified gastroenterologist and provides comprehensive and compassionate gastrointestinal care at his practice in Forest Hills, Queens, in New York City. To ensure his patients get the best care possible, Dr. Reich regularly pursues continuing education and training opportunities to expand his knowledge and skillset.
After graduating with a Bachelor of Arts in philosophy from Yeshiva University in New York City, Dr. Reich went on to earn his Doctor of Medicine at the Albert Einstein College of Medicine, one of the top medical schools in the country, which is located in the Morris Park neighborhood of the Bronx in New York City. He continued his medical training at Montefiore Medical Center, also in New York City, completing both his internship and residency program in internal medicine. He then went on for his fellowship training in gastroenterology at Westchester Medical Center in Valhalla, New York.
Dr. Reich is a board-certified diplomate in both internal medicine and gastroenterology. He is also an active member of the American Society for Gastrointestinal Endoscopy.
To better meet the needs of his diverse community, Dr. Reich is fluent in English, Hebrew, and Spanish.
Dr. Reich is an empathetic and attentive physician who takes the time needed with each of his patients to educate them about their gastrointestinal condition, so they can make the most informed decisions about their care.
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. Boris Chusid is a gastroenterology specialist with over 30 years of experience in his profession. He earned his medical degree from Brown University School of Medicine in 1991 and completed his residency at Lenox Hill Hospital in 1998. Dr. Chusid’s clinical expertise is vast, with specific emphasis on the following gastrointestinal diseases and disorders:
Diarrhea
Gastroesophageal reflux disease (GERD)
Hemorrhoids
Hepatitis
Inflammatory bowel disease (IBD)
Dr. Chusid’s passion for helping his patients find the best health outcomes resulted in him performing over 35,000 endoscopic procedures over the course of his career. Dr. Chusid specializes in the following gastrointestinal procedures:
Dr. Chusid uses the most advanced diagnostic techniques and minimally invasive methods to achieve the best possible results for each of his patients. Dr. Chusid is fluent in Russian and has some fluency in Spanish, allowing him to treat and help patients from a variety of backgrounds.
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.
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. 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.
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