New Faces at UBMD

Four of seven new physicians to join UBMD.

Pictured above are four of the seven physicians to recently join UBMD Physicians' Group practices. Top row, left to right: Katherine Vergos, MD and Ahmad Zaaroura, MD. Bottom row, left to right: Jon Von Visger, MD, PhD and Aaron Hoffman, MD.

Published May 23, 2018 This content is archived.

As we’ve officially turned the corner into spring, we wanted to take a moment to welcome all of the new faces at UBMD Physicians’ Group. Seven physicians joined our team during the first quarter of 2018, adding new experience and expertise to our practices. Join us in welcoming these new doctors to the largest medical group in Western New York.

Frank Cohen, MD

Expanding the number of physicians in WNY allows us to further our mission to be one source for the life you lead.

Dr. Frank Cohen has joined UBMD Surgery, working in Warsaw until July, after which he will see patients both in Warsaw and at Buffalo General Medical Center. Cohen graduated from the University of Florida and completed his residency in general surgery at the Montefiore Medical Center of the Albert Einstein College of Medicine.

Cohen specializes in a range of different laparoscopic and colorectal procedures, as well as hernia repairs. This includes surgeries to correct inguinal hernias – both primary or recurrent, and with or without mesh – rectus diastasis, ventral hernias and other abdominal concerns.

Tildabeth (Tilda) Doscher, MD, MPH

Dr. Tilda Doscher joined UBMD Family Medicine this quarter, working in sites across Western New York. Doscher attended UCLA School of Medicine for medical school and her residency, earned her Masters in Public Health from the UCLA School of Public Health, and completed her fellowship in addictions medicine at the University at Buffalo. 

Doscher spealizes in addictions medicine with UBMD Family Medicine, but before that she worked in primary care and preventive medicine for several years across the US, and as a Travel Medicine Physician going to Papua New Guinea, Nepal, Rwanda and more. Doscher is also a certified Yoga teacher.

Aaron B. Hoffman, MD

Dr. Aaron B. Hoffman is the second of three additions to the UBMD Surgery team in the first quarter. He graduated from North Shore University Hospital, specializing in both laparoscopic and bariatric medicine. Hoffman is currently seeing patients at Buffalo General Medical Center.

Hoffman has been part of the greater Buffalo community for several years and has served as a clinical associate professor at the Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo since 2016. His surgical specialties include bariatric and laparoscopic surgeries, as well as gastrointestinal surgery, covering such procedures as anti-reflux surgery/LINX, endoscopies and colonoscopies, gastrointestinal surgeries and hernia repairs.

John ‘Mo’ Hourihane, MD

Joining the UBMD Neurology team is Dr. John Hourihane. A graduate of the Royal College of Surgeons in Ireland, Hourihane has practiced medicine for more than 20 years, bringing a wealth of knowledge and experience to the UBMD Neurology practice. He is seeing patients at the Gates Vascular Institute and takes outpatient appointments at the UBMD Neurology Pediatric and Adult Neurology Clinic in Williamsville.

Hourihane completed residencies in neurology at both Massachusetts General Hospital and Oregon Health & Science University, and he helps train future neurologists as a clinical assistant professor.

Katherine A. Vergos, MD

The newest member of the UBMD Pediatrics practice, Dr. Katherine Vergos, is by no means new to Western New York. Vergos completed her undergraduate studies locally at Daemen College and went on to receive her doctorate at National and Kapodistrian University of Athens. She completed an internship and residency in pediatrics at Tod Children’s Hospital in Ohio, and she has worked in both the Rochester and Buffalo areas for more than two decades.

Vergos sees patients as an attending physician in the division of general pediatrics at Niagara Street Pediatrics and Towne Gardens Pediatrics, both part of the Oishei Children’s Hospital. She also is a member of the faculty at the Jacobs School, serving as a clinical assistant professor of pediatrics.

Jon Von Visger, MD, PhD

Dr. Jon Von Visger brings more than 15 years of nephrology experience and excellence to UBMD Internal Medicine, including being named one of America’s Top Physicians in 2012 and one of the Leading Physicians of the World in 2015. Von Visger spent the past 13 years at The Ohio State University Transplant Center as an attending and clinical researcher and was recently named the medical director of transplant and renal services at Erie County Medical Center.

Von Visger completed his training in nephrology and transplantation at Harvard University in Massachusetts. In his career, he has specialized in extending and improving outcomes with both native kidneys and renal transplant functions. He also shares his extensive knowledge and insights in the field of kidney medicine with the next generation of doctors as a professor in the Jacobs School.

Ahmad Zaaroura, MD

Finally, Dr. Ahmad Zaaroura has also joined UBMD Surgery as a transplant surgeon. Zaaroura comes to Buffalo from the Raleigh-Durham region of North Carolina, where he previously worked at the Duke University Health System. He is performing surgical procedures for patients at ECMC and sees patients on an outpatient basis at the DK Miller Building on the ECMC campus.

Zaaroura completed his medical studies at Jami’t Al-Ba’ath in Hims, Syria, and completed fellowships at Clemenceau Medical Center in Beirut, Lebanon and The Ohio State University Wexner Medical Center, in addition to Duke University Health System. He specializes in abdominal organ transplants and hepatobiliary surgical procedures, or surgeries involving the liver, gallbladder or related structures.

All of us here at UBMD Physicians’ Group are excited to welcome all of our new doctors to the team, and look forward to working together to provide the best care possible for our patients. Learn more about all the capabilities of the UBMD team and find a physician near you today by visiting UBMD Physicians’ Group online at