Penn State Hershey Colon and Rectal Surgery service currently consists of:
Walter A. Koltun, M.D.
Chief of Colon and Rectal Surgery
Peter and Marshia Carlino Professor of IBD
- Lisa S. Poritz, M.D.
- Kevin J. McKenna, M.D.
- Evangelos Messaris, M.D., Ph.D.
Colon and Rectal Residency Program Director
- Frances J. Puleo, M.D.
- David B. Stewart, M.D.
Director of Colon and Rectal Research