Meet the Team

Surgeon-in-Chief and Program Director

Carroll M. Harmon, MD, PhD

Attending Surgeon

Kathryn D. Bass, MD, MBA

Director, Level I Pediatric Trauma Center

David H. Rothstein, MD, MS

Leader of Pediatric Surgery Quality and Patient Safety

Kaveh Vali, MD

Attending Surgeon

Elizabeth Bowdish, MD, MA

Attending Surgeon

Phillip Benson (Ben) Ham, III, MD, MS

Fellow

Nurse Practitioners and Physician Assistant

Kerenza Anderson, NP
Jena Mamon, PA
Lynn Melisz, CPNP
Michele Boyle, PA
Theresa McDonough, FNP
Kathleen Marshall, RN

Office Manager/Program Administrator

Sarah J. Hoffman


HarmonCarroll McWilliams (Mac) Harmon, MD, PhD

Carroll M. Harmon, MD, PhD is the John E. Fisher Professor of Surgery and the Division Chief of Pediatric Surgery in the Department of Surgery at the Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo, Program Director of the Pediatric Surgery Fellowship Program, Surgeon in Chief and Medical Director of Pediatric General & Thoracic Surgery at Oishei Children’s Hospital, Chief of Surgery for Kaleida Health, and Director of the Pediatric Surgery Research Laboratory.

Dr. Harmon’s research interests include pediatric obesity, both clinical as well as at a basic science. This includes long-term outcomes in adolescent bariatric surgery.  He also has a career long commitment to promoting the development and application of advanced neonatal and pediatric minimally invasive endosurgery.

Dr. Harmon is a past president of the International Pediatric Endosurgery Group and a member of the American Pediatric Surgical Association, American College of Surgeons, American Academy of Pediatrics,  Society of American Gastrointestinal Endoscopic Surgeons, Central Surgical Association, The Obesity Society, Society for Metabolic and Bariatric Surgery,  American Society of Parenteral and Enteral Nutrition, and Children’s Hospital Association Surgeon-in-Chief Forum.

Dr. Harmon received his BS in Biology at the University of Alabama and has Medical and Philosophy doctorates and training in General Surgery from Vanderbilt University.  He is board certified in adult and pediatric general and thoracic surgery.


Kathryn D. Bass, MDKathryn D. Bass, MD, MBA

Kathryn D. Bass, MD, MBA is a pediatric surgeon with over 20 years of experience.  Dr. Bass is an Associate Professor of Surgery at the Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo and director of the Level 1 Pediatric Trauma Center and co-director of the Pediatric Wound Care Center at Oishei Children’s Hospital. 

Dr. Bass graduated with honors from Northwestern University in Chicago with a BS in Biomedical Engineering where she worked on design for life support systems.  Dr. Bass received her medical degree from Northwestern University, did her general surgery training in Boston at Tufts University, and completed her pediatric surgery training in Denver at University of Colorado.  Recently, Dr. Bass completed her executive MBA at the Kellogg School of Management and has additional board certification in Wound Care Management. 

Dr. Bass has expertise in minimally invasive surgery, surgery for congenital anomalies of the newborn, and chest and abdominal surgeries in childhood.  Core research interests of Dr. Bass include trauma and wound care innovations. 

Dr. Bass is a fellow of the American College of Surgeons and belongs to many professional organizations, including the American Pediatric Surgical Association, The American Academy of Pediatrics, The American Association for the Society of Trauma, The International Pediatric Endoscopic Group, and the International Society for Pediatric Wound Care.


David H. Rothstein, MD, MSDavid H. Rothstein, MD, MS

David H. Rothstein, MD, MS is an attending pediatric surgeon at Oishei Children's Hospital, and Associate Professor of Surgery at the Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo. He is the leader of Pediatric Surgery Quality and Patient Safety at Oishei Children's Hospital.

Dr. Rothstein’s interests include outcomes research, the study of transitions between pediatric and adult surgery, resident education and minimally invasive surgery. He is actively involved in global health, working to improve the delivery of surgical care in resource-poor and conflict areas.

Dr. Rothstein is a fellow of the American Academy of Pediatrics and the American College of Surgeons. He also belongs to the American Pediatric Surgical Association, the International Surgical Society, the Society of American Gastrointestinal Endoscopic Surgeons, the Association for Academic Surgery and the Children’s Oncology Group.

Before coming to Buffalo, Dr. Rothstein spent six years as an Assistant Professor of Surgery at the Northwestern University Feinberg School of Medicine in Chicago. He obtained a BS in Biology at the Massachusetts Institute of Technology before completing his medical degree at University of Massachusetts Medical School. He also received a Masters in Health Services Research at Northwestern University.  His general surgery training was done at Maine Medical Center in Portland, Maine, and his pediatric surgery training was done at Schneider Children’s Hospital in New Hyde Park, New York. Dr. Rothstein also completed a Pediatric Surgical Critical Care fellowship at Boston Children’s Hospital. He is board certified in General, Pediatric, and Critical Care Surgery by the American Board of Surgery.


valiKaveh Vali, MD, FACS

Kaveh Vali, MD is an attending pediatric surgeon at Oishei Children’s Hospital, Associate Professor of Surgery at the Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo and Assistant Program Director of the Pediatric Fellowship Program.  Dr. Vali has been an attending at Oishei Children’s Hospital since finishing his training in 2011.   He has been on multiple committees and is a devoted educator to the surgical residents and fellows.

Dr. Vali’s interests include minimally invasive pediatric surgery, as well as pediatric gastro-intestinal challenges such as short bowel syndrome and colo-rectal disorders.

He attended medical school at McGill University and completed his general surgery training at the University of California San Francisco. He continued his training and completed his Pediatric Surgery Fellowship at the University of Montreal. He is board certified in both adult general surgery and pediatric general surgery.

Dr. Vali is a fellow of the American College of Surgeons and a fellow of the American Academy of Pediatrics.


BowdishElizabeth Bowdish, MD, MA

Elizabeth Bowdish, MD, MA is an attending pediatric surgeon at Oishei Children's Hospital and Assistant Professor of Surgery at the Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo. 

Dr. Bowdish earned her BS in Nutritional Sciences from Cornell University and her medical degree from Boston University School of Medicine.  She also earned her Masters of Arts in Medical Sciences at Boston University.  She completed her general surgery training as well as her pediatric surgery fellowship at the University at Buffalo. She also completed the pediatric surgery critical care fellowship at the University of Michigan in Ann Arbor, MI. She is board certified by the American Board of Surgery in general and pediatric surgery as well as surgical critical care.  

Dr. Bowdish’s interests include surgical education, surgical critical care, pediatric surgical oncology and minimally invasive surgery. Dr. Bowdish is a member of the American College of Surgeons, American Pediatric Surgical Association, Society of Critical Care Medicine, International Pediatric Endoscopy Group and the Association of Surgical Education.


HammPhillip Benson (Ben) Ham, III, MD, MS

Phillip Benson (Ben) Ham, III, MD, MS is the Pediatric Surgery Fellow at Oishei Children’s Hospital for 2018-2020. 

Dr. Ham graduated summa cum laude, with highest honors from the University of Georgia with a BS in Chemistry and completed a MS in Chemistry concomitantly.  He received his medical degree from the Medical College of Georgia and completed his general surgery training also at the Medical College of Georgia at Augusta University.  

Interests of Dr. Ham's include Minimally Invasive Surgery, ECMO, Pediatric Surgical Oncology, and Clinical Informatics. 

Dr. Ham is a member of the National Eagle Scout Association, the American Pediatric Surgical Association, the American College of Surgeons, the Alpha Omega Alpha Honor Society, and the Society of American Gastrointestinal and Endoscopic Surgeons.  He has received the Merck Manual Award, the Leonard Tow Humanism in Medicine Award, and multiple teaching awards.