
Raymond K.
Cross, M.D.
Assistant Professor of Medicine
Director, Inflammatory Bowel Disease Program
Gastroenterologist
Special Interests: Inflammatory Bowel Disease
Dr. Cross is a gastroenterologist. He specializes in treating patients with inflammatory bowel disease, such as ulcerative colitis and Crohn’s disease.
Peter Darwin, M.D.
Associate Professor of Medicine
Director, GI Endoscopy
Gastroenterologist
Special Interests: Liver Disease, Pancreatitis, Pancreatic Cancer, Pancreatic Disease, Therapeutic Endoscopy, Hepatobiliary Disorders, GI Cancers
Dr. Darwin’s clinical focus is endoscopy, allowing for both the diagnosis and therapeutic treatment of GI disorders. He performs ERCP and EUS for benign and malignant disorders of the biliary tract and pancreas as well as upper endoscopy and colonoscopy for removal of difficult polyps, control of bleeding and enteral stenting. Dr. Darwin also performs balloon enteroscopy, a new method employed to allow access and therapy to the small intestine.
George Fantry, M.D.
Associate Professor of Medicine
Director, Heartburn and Dyspepsia Program
Gastroenterologist
Special Interests: GERD, Esophageal Motility Disorders
Dr. Fantry is a gastroenterologist specializing in the diagnosis and management of GERD (Gastroesophageal Reflux Disease). He sees patients in the multi-specialty Voice and Swallowing Center.
Bruce Greenwald, M.D.
Associate Professor of Medicine
Director, Gastroenterology Fellowship Training Program
Gastroenterologist
Special Interests: Gastrointestinal Motility, Functional Gastrointestinal Diseases, IBS, Endoscopic Ultrasound, Esophageal Cancer, Barret’s Esophagus
Dr. Greenwald’s clinical and research interests involve malignant and pre-malignant diseases of the esophagus. These include esophageal cancer, Barrett’s esophagus and esophageal squamous dysplasia.
Adrian Park, M.D., F.R.C.S. (C), F.A.C.S.
Campbell and Jeanette Plugge Professor of Surgery
Vice Chair, Department of Surgery
Head, Division of General Surgery
Surgeon
Special Interests: Gastroesophageal Reflux, Achalasia, Hiatal Hernia, Intestinal Disorder, Ventral/Incisional Hernia, Surgery of the Spleen and Adrenal Gland
Dr. Park is a renowned laparoscopic surgeon. He specializes in minimally invasive gastrointestinal surgery, including the treatment of gastroesophageal reflux, achalasia, hiatal hernia, intestinal disorders and ventral/incisional hernias. He also has extensive experience and interest in laparoscopic splenic and adrenal surgery. He is an active researcher in minimally invasive surgery and has been directly involved in initiating, developing, and applying new techniques and technologies in endoscopic surgery.
Jean-Pierre Raufman, M.D., F.A.C.P., F.A.C.G.
Professor of Medicine
Head, Division of Gastroenterology and Hepatology
Gastroenterologist
Special Interests: Gastric Gland Secretions, Bile Acids, Peptic Ulcers, Hepatitis C
Dr. Raufman is a gastroenterologist providing evaluation and treatment for patients with diseases of the gastrointestinal tract and liver, including colon cancer screening.

Allison Steele, C.R.N.P.
Nurse Practitioner, Division of Gastroenterology
Special Interests: Inflammatory Bowel Disease
Allison Steele is a nurse practitioner who specializes in the treatment of patients with gastrointestinal concerns.
Patricia
L. Turner, M.D., F.A.C.S.
Assistant Professor of Surgery
Surgeon
Special Interests: Minimally Invasive Surgery, Laparoscopic Surgery, Gastrointestinal Surgery, Endocrine Surgery, General Surgery
Dr. Turner is a surgeon specializing in minimally invasive surgery. Minimally invasive surgery uses high-tech equipment to perform the surgery through multiple small incisions, resulting in less pain and earlier return to normal daily activities than traditional open surgery.