Ramiro De La Guerra, MD Ramiro De La Guerra, MD, is a gastroenterologist with AHN Medicine Institute, specializing in the diagnosis and treatment of patients for various digestive disorders, with special interest in eosinophilic esophagitis. He is skilled at performing gastroenterology procedures, such as colonoscopies, and EGD. Dr. De La Guerra went to medical school at St. George’s University School of Medicine in St. George, Granada. He did his residency and completed his fellowship in gastroenterology at Allegheny Health Network in Pittsburgh, PA. Dr. De La Guerra is certified by the American Board of Internal Medicine and is affiliated with the Pennsylvania Society of Gastroenterology and the American College of Gastroenterology. He sees patients ages 18 and older.