CC, 51 E 25th St suite # 429 10010 212-389-1336 Mon-Fri 8 a.m - 5 p.m All cc, cash, checks. At Manhattan Gastroenterology located on the Upper East Side and Midtown in NYC and , we are proud to offer state of the art gastroenterology, endoscopy and colonoscopy services. Through our integrative approach, we pride ourselves on spending the time necessary to analyze and treat difficult digestive issues that can often be overlooked in today’s fast paced healthcare environment.