Conditions Treated by Dr. Robert J. Zwiener, MD

• Abdominal Pain
• Anemia
• Biliary Atresia
• Cholecystitis and Gallstones
• Crohn's Disease (Regional Enteritis)
• Diaphragmatic and-or Hiatal Hernia
• Esophageal Achalasia and Cardiospasm
• Esophageal Varices
• Gastroesophageal Reflux Disease (GERD)
• Gastroparesis
• Hemorrhoids
• Hepatitis B - Immune Response
• Intestinal Obstruction
• Ulcerative Colitis