HomeServicesGastroenterology Gastroenterology Robert Rose, DOSiaka Yusuf, MDRachael Wheelock, PA-CScott Zeilstra, PA-C Gastroenterology procedures are performed in private rooms for patient comfort. Anesthesia care is provided by nurse anesthetists.ColonoscopyEsophagogastroduodenoscopy (EGD)Flexible sigmoidoscopyGeneral gastroenterology consultsEsophageal varicesReferral InstructionsCall 517.663.9403 to schedule an appointment. Robert Rose, DO Siaka Yusuf, MD