Erie County Medical Center (ECMC) Corporation officials today announced that four physicians were recently appointed to the medical staff of the Regional Center of Excellence for Transplantation and Kidney Care at ECMC.

Dr. Jon VonVisger was appointed Primary Nephrologist and Medical Director. Dr. VonVisger completed combined MD and PhD degrees at the University of Maryland, School of Medicine in Baltimore, MD (1996) with doctoral work on central nervous system regeneration and nerve growth factors. He went on to complete an Internal Medicine residency in the University of Maryland Medical System. He is specialty trained in Nephrology and Transplant Medicine through Harvard, Massachusetts General and Brigham and Women’s Hospitals (2005). Dr. VonVisger practiced Transplant Nephrology at The Ohio State University (OSU) Comprehensive Transplant Center in Columbus, OH (2005-2018) one of the ten largest transplant centers in the United States. While at OSU, he directed and participated in multi-center clinical trials for renal and transplant-related conditions including new device and drug applications. Dr. VonVisger’s goals for ECMC are to enhance state-of-the-art transplant care, while continuing to develop novel therapies to improve renal and transplant outcomes. In addition, he intends to help lead efforts to encourage participation and awareness of renal and transplant needs in the community.

Dr. Ashish Kataria, Transplant Nephrologist: Dr. Ashish Kataria earned his medical degree from the All India Institute of Medical Sciences, New Delhi, India. He completed his residency in Internal Medicine and a fellowship in Nephrology from the Hofstra Northshore LIJ School of Medicine (2013). During his nephrology fellowship, he was awarded the Allison Norris nephrology fellow award by the New York Society of Nephrology. Dr. Kataria performed a fellowship in renal transplant from the Medical College of Wisconsin in Milwaukee, Wisconsin (2013-2014). Before joining ECMC as a Transplant Nephrologist and the University at Buffalo as a Clinical Assistant Professor of Medicine, he served as Assistant Professor in the Department of Nephrology at the Institute of Liver and Biliary Sciences, New Delhi, India. Dr. Kataria has published numerous research articles on hemodialysis, peritoneal dialysis and glomerulonephritis (a type of kidney disease). His ongoing research projects include waitlist management of kidney transplant patients, outcomes in transplantation and pharmacokinetics of transplant immunosuppression.

Dr. Ahmad Zaaroura, Transplant Surgeon: Dr. Zaaroura is a multi-organ transplant surgeon who specializes in kidney, complex liver and bile duct surgery. He trained in multi-organ transplant at the Ohio State Wexner Medical Center. He gained additional expertise and training in hepatobiliary surgery and liver and bile duct reconstruction techniques at Duke University Medical Center. He is certified in kidney and pancreas transplant as well as vascular access from The Ohio State University Medical Center. He is also certified in liver transplant and hepatobiliary surgery for adult and pediatric patients from Duke University Medical Center.


Dr. Keisha Bonner, Transplant Surgeon: Dr. Bonner came to ECMC from Mayo Clinic, MN, where she completed her transplant surgery training and prior to that performed her general surgery training at Harlem Hospital and its affiliation at Columbia University. She specializes in living and deceased donor kidney transplantation, pancreas transplantation as well as donor nephrectomy (kidney removal). Dr. Bonner’s areas of research interest include clinical and translational research to further understand and improve patient and graft outcomes, as well as patient and provider education.