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William Joseph Wenner, Jr., M.D.

Office Information

Penn State Hershey Pediatric Gastroenterology
500 University Drive
Hershey, PA 17033
Tel: (800) 243-1455 / (717) 531-6807 Fax: (717) 531-0653


Pediatric Gastroenterology

Practice Locations

Biographical Information

Dr. Wenner received his medical degree from Penn State College of Medicine and was trained in pediatrics at Stanford University Hospital in California. He completed his Pediatric Gastroenterology and Nutrition training at The Children’s Hospital of Philadelphia. Publishing over 40 articles and books, he has practiced at the University of California Davis and The Children’s Hospital of Philadelphia for almost 20 years.  He has a special interest in Inflammatory Bowel Disease. Dr. Wenner joined our faculty in 2008 and currently is the Director of Pediatric Gastroenterology and Nutrition Clinical service.

Professional Education

Fellowship, Gastroenterology, Children's Hospital of Philadelphia (1988) Residency, Pediatrics, Stanford University, School of Medicine (1986) Internship, Pediatrics, Stanford University, School of Medicine (1984) M.D., Penn State Hershey College of Medicine (1983)


Wenner WJ
Is expert testimony the practice of medicine?
J Medical Discipline and Licensure. 2003.
Wenner WJ
Does the law protect children in research: Differing perspectives of Physicians and the Law
J Juvenile Law & Justice. 2004.
Wenner WJ
Managed care: a problem or a solution in the health care of children

Current Problems in Pediatrics. 2000:30:209-236.

Kader HA, Wenner WJ, Baldasssano, RN, Ruchelli E,Carpenteri DF, Verma R, Mascarenhas MR
Colonic inflammation found at diagnosis of juvenile retention polyps in pediatric patients

Am J Gastroenterolo. 2000 Aug; 95 (8): 1990-3.