Patients who are referred directly for a colonoscopy will be contacted by phone by a scheduler at Gastroenterology Consultants and be asked questions to determine the best bowel preparation and sedation for them (conscious sedation with fentanyl and versed vs. propofol, and to insure that the patient has no significant co-morbidities that might require a pre-colonoscopy visit for medical assessment (anticoagulants, severe lung disease, recent MI, bleeding disorder).