Dr. Ayub graduated from Khyber Medical College in Peshawar, Pakistan. He furthered his education and training with a residency in Internal Medicine at Greater Baltimore Medical Center and subsequently became the chief resident. He completed fellowships in gastroenterology and advanced endoscopy at Baylor College of Medicine in Houston, Texas. Dr. Ayub is considered an expert in the field of endoscopic ultrasound, Gastroesophageal Reflux Disease, Barrett’s Esophagus, and advanced endoscopy/ERCP. He is board certified in gastroenterology.