Interventional GI
At Mount Sinai Doctors - Bellmore, Interventional GI, we provide comprehensive diagnostics and treatment for a range of digestive diseases and conditions, in a safe, convenient location. Patients no longer have to visit the city for the treatment of their complicated pancreas and biliary problems, or endoscopic management of complex gastrointestinal (GI) disorders.
What is Endoscopy?
An endoscope is a small, flexible tube that can be used to diagnose and treat numerous GI concerns. With endoscopy, doctors can diagnose conditions, clear blockages, remove cysts or stones, or remove tumors without invasive surgery. This results in less discomfort and a shorter recovery time for the patient. Endoscopic procedures can be performed on an outpatient basis, making them convenient for patients.
At Mount Sinai Doctors - Bellmore, Interventional GI, conditions we diagnose and treat include:
- Colon polyps and cancer
- Other GI cancers (such as cancers of the pancreas, esophagus, bile ducts, stomach, bowel and liver)
- GI bleeding and tumors
- Barrett’s Esophagus, GERD (gastroesophageal reflux disease), and precancerous lesions
- Pancreatic cysts and chronic pancreatitis
- Dysphagia (difficulty or discomfort in swallowing)
- Anemia and occult bleeding
- Gallstones
- Obstructions, tumors, and polyps
- Fluid leaks or buildup
Offering the Latest Technology
Our center offers advanced procedures and uses the latest technology to diagnose and treat digestive diseases and conditions. Some of the advanced technologies we offer are:
The Spyglass Visualization system, which allows our physicians to view the pancreas and bile ducts with a precision never achieved before—providing more reliable diagnosis and minimally invasive treatment.
The Confocal Laser Endomicroscope, which provides enhanced images of the digestive tract to detect and treat GI cancers at their earliest stages.
Radiofrequency Ablation, a technique that uses thermal energy to destroy cancerous and precancerous tissue, and is an effective treatment for Barrett’s Esophagus, bile ducttumors, pancreatic cysts and radiation proctitis.
Endoscopic Submucosal Dissection (ESD) and Endoscopic Mucosal Resection (EMR), which represent major advances in treating Barrett’s Esophagus and early GI cancers. Endoscopists inject fluid to elevate the lesion, then cut away the surrounding tissues to remove it.
Cryotherapy, or tissue-freezing, a procedure that addresses a variety of lesions in the digestive tract.
DNA analysis of tissue samples (Fluorescent In Situ Hybridization, or FISH) which helps to evaluate strictures,or abnormal narrowing, of the bile duct.
Stretta and Transoral Incisionless Fundoplication (TIF) for treatment of gastroesophageal reflux disease (GERD).
Why Choose Mount Sinai Doctors - Bellmore, Interventional GI?
Patients have access to the latest innovations, the highest quality GI care and a multidisciplinary team approach. Patients who choose Mount Sinai Doctors - Bellmore, Interventional GI can expect expert physician care in a comfortable, convenient location where their diagnostic and treatment care can be addressed without the need for an inpatient hospital stay.
Mount Sinai Doctors - Bellmore, Interventional GI
2750 Merrick Road
Bellmore, NY 11710
For information and appointments, call (516) 992-5626.
About the Physicians

Frank G. Gress, MD
Dr. Gress is the medical director of Mount Sinai Doctors - Bellmore, Interventional GI. He also serves as the lead for therapeutic endoscopy for Mount Sinai in Long Island and has an appointment as Senior Faculty in the Division of Gastroenterology at the Icahn School of Medicine at Mount Sinai. Board-certified in Internal Medicine and Gastroenterology, he specializes in the diagnosis and treatment of disorders of the pancreas and bile ducts, GI malignancies including colon and pancreatic cancer, pancreatitis, pancreatic cysts, gallstones, and Barrett’s Esophagus and removal of large polyps and early cancers. He has made significant contributions to the field of therapeutic endoscopy.
He completed his medical degree from Mount Sinai School of Medicine in New York, NY. Dr.Gress completed residency training in Internal Medicine at Montefiore Medical Center in New York, NY. He completed two fellowships, one in Gastroenterology and Hepatology at The Brooklyn Hospital Center in Brooklyn, NY and another in Advanced Therapeutic Endoscopy Training at Indiana University-Purdue University Indianapolis in Indianapolis, IN.
Prior to joining South Nassau, Dr. Gress was Clinical Chief of the Division of Digestive and Liver Diseases, Chief of Endoscopy and Interventional Endoscopy, an attending physician and a Professor of Medicine at Columbia University Medical Center in New York, NY. He was also an attending physician at New York Presbyterian Hospital in New York, NY.

Iman Andalib, MD
Dr. Andalib is the Director of Endoscopic Surgery at Mount Sinai Doctors - Bellmore, Interventional GI. He has an appointment as an Assistant Professor in the Division of Gastroenterology at the Icahn School of Medicine at Mount Sinai School of Medicine in New York. Dr. Andalib is board certified in Internal Medicine and Gastroenterology and obtained his medical degree from Ross University School of Medicine in Dominica, West Indies. He completed residency training in Internal Medicine at Georgetown University Hospital in Washington, D.C. He completed his Gastroenterology fellowship at SUNY Downstate Medical Center in Brooklyn, NY and an Advanced Endoscopy fellowship at Robert Wood Johnson University Hospital in New Brunswick, New Jersey. Dr. Andalib performs diagnostic and therapeutic endoscopy as well as other minimally invasive endoscopic surgeries. He has published multiple articles on these topics and lectures frequently at national and international meetings.
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GI — Endoscopy Unit