Mon-Fri 8 a.m - 5 p.m All cc, cash, checks The most frequent reasons that patients from throughout NYC visit Manhattan Gastroenterology: Breath Testing. Breath test is used to diagnose conditions such as fructose, lactose intolerance and SIBO. These disorders create a chemical response that can be measured in your breath. Upper Endoscopy. Upper endoscopy allows gastroenterologists to diagnose upper abdominal pain, nausea, vomiting, difficulty swallowing. Best test to find cause of upper gastrointestinal tract bleeding. Upper endoscopy is more accurate than X-rays. Colonoscopy. Colonoscopy is a medical outpatient procedure. It allows the gastroenterologist to examine a large intestine. Colonoscopy to test for colon cancer, pre-cancerous polyps (removed at the same time by the NYC gastroenterologist). Hemorrhoids. Hemorrhoids are veins around the anus or lower rectum that have become swollen and inflamed and are extremely common in men and women. Hemorrhoids can happen either inside the anus or under the skin around the anus. Laser Hemorrhoid Removal. As a trained gastroenterologist, Dr. Khodadadian is familiar with the signs and treatment options of hemorrhoids including laser hemorrhoid removal and hemorrhoidal banding. To eliminate hemorrhoids, infrared coagulation (or IRC) has been shown to be effective and fast acting.