104 Technology Dr
Suite 202
Butler, PA 16001

Our Staff

Benbrook Gastroenterology Associates, LLC

The brief descriptions below are designed to familiarize you with our staff's training, professional credentials and work experience.

Donald A Walters, DO

Donald A Walters, DODr. Walters is a native of Western Pennsylvania.  He completed his undergraduate studies at Washington and Jefferson College and medical school at the Philadelphia College of Osteopathic Medicine.  He returned to Pittsburgh for his residency and chief residency in Internal Medicine at the Mercy Hospital of Pittsburgh before going on to the Western Pennsylvania Hospital for a fellowship in Gastroenterology.  His final year of training was at St. Luke's Medical Center in Milwaukee, Wisconsin where he completed a fellowship in biliary and pancreatic endoscopy.  Dr. Walters is board certified in Gastroenterology.

During his residency and fellowships Dr. Walters participated in numerous research studies involving various aspects of gastrointestinal disease and endoscopy.  He also has a number of publications and has made numerous presentations at national and local meetings.  Dr. Walters is a member of the American Medical Association, American Gastroenterology Association, the American College of Gastroenterology, the American Society for Gastrointestinal Endoscopy along with various state and local medical societies.  Dr. Walters has served on the Practice Management Committee  for the ASGE.

Dr. Walters is married and lives with his two daughters in Gibsonia, PA.

Peter J. Molloy, MD

Peter J. Molloy, MD

Dr. Molloy graduated from Fordham University and completed his medical school education at the State University of New York- Stony Brook School of Medicine.  He subsequently was an Internal Medicine resident at Monmonth Medical Center, New Jersey, and completed a Gastroenterology fellowship at the Western Pennsylvania Hospital.  He previously was Chief of Gastroenterology and Fellowship Program Director at West Penn with the academic rank of Associate Professor of Medicine, Temple University.  While at West Penn he received Teacher of the Year recognition twice.

Dr. Molloy has authored more than 20 peer-reviewed publications including book chapters, review papers and articles.  His scholarly activity has been presented more than 30 times at National meetings.  He previously was a member of the Educational Affairs Committee of the American College of Gastroenterology and is currently a member of the College's National Affairs Committee.  Dr. Molloy is a Fellow of the American Gastroenterology Association, Fellow of the American College of Gastroenterology and a Fellow in the American Association of the Study of Liver Diseases.  He is Board Certified in both Internal Medicine and Gastroenterology.

Dr. Molloy lives in Wexford, PA with his wife and two daughters.

Krysia L. Zancosky DO

Krysia L. Zancosky D.O.

Dr. Zancosky is a native of Buffalo, New York.  She received her B.S. in Pharmacy at Duquesne University and completed her medical school education at Lake Erie College of Osteopathic Medicine.  She was an Internal Medicine resident and chief medical resident at the Western Pennsylvania Hospital, then went on to complete her fellowship in Gastroenterology at the West Penn Allegheny Health System.  Dr. Zancosky is board certified in Internal Medicine and Gastroenterology.

Dr. Zancosky has a special interest in women's health issues including Colorectal Cancer Screening and Irritable Bowel Syndrome (IBS).  She is a member of the American Medical Association, American Gastroenterology Association, and the American College of Gastroenterology.

Dr. Zancosky lives in Gibsonia, PA with her husband and four children.

Kelly A. Lee, CRNP

Kelly A. Lee, CRNP received her RN degree from Sewickley Valley Hospital School of Nursing in 2003 and worked at Sewickley Hospital in various critical care units and emergency room. She went on to received her Bachelor of Science in Nursing degree from Waynesburg University in 2010.  Kelly graduated from Carlow University in 2015 with her Masters of Science in Nursing degree.  Kelly is a certified by the American Academy of Nurse Practitioners.

Kelly lives in the Cranberry Township area with her husband and two children.  







Contact Us