Sam Drake M.D. Board Certified Gastroenterologist. Serving Gaston County for over 25 Years. New Patients Welcome. Colonoscopy Procedures. Participate with most major insurance plans, including Medicare and North Carolina Medicaid.. Comprehensive Detection and Treatment for Gastroesophaegeal Reflux,Colitis,Constipation,Infectious Diarrhea,Gallstones,Heartburn,Hemorrhoids,Celiac Disease,Liver Transplant,Irritable Bowel Syndrome,Ulcerative Colitis,Crohn's Disease,Diverticulitius,Abdominal Pain,Pancreatic Disorders,Jaundice. Proceedures include Endosocopy,Upper Endoscopy (EGD),Colon Cancer Screening,Colonoscopy