Red Bank Gastroenterology. 365 Broad Street, Red Bank, NJ 07701, us. Red Bank Gastroenterology (RBG): 732-842-4294 Endoscopy Center of Red Bank (ECORB): 732-842-9129 Direct number for scheduling a procedure: 732-936-8315 ECORB Billing: 732-842-4294 RBG / ADH Billing: 732-222-3805 Fax: 732-548-7408.