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New Faculty

Division of Cardiac Surgery

Sunil Prasad, M.D.


Dr. Sunil Prasad has been named Chief of Cardiac Surgery. Dr. Prasad trained in cardiothoracic surgery at the Washington University School of Medicine and Barnes-Jewish Hospital. He was later appointed to the medical school’s faculty and served as an attending heart surgeon at Barnes-Jewish Hospital. Immediately prior to joining UR Medicine, Dr. Prasad served as the executive director of the cardiovascular service line and director of ECMO/LVAD at Mercy Springfield Hospital in Springfield, MO. While Dr. Prasad performs a range of complex surgical procedures, including heart transplants, he has special expertise in the use of mechanical devices to help patients who are in heart or respiratory failure. He led Barnes-Jewish Hospital’s program in ECMO and has helped pioneer the next generation of ECMO, known as "walking ECMO," which uses portable devices that allow patients to get out of bed and walk with their device, often reducing complications and improving outcomes. Dr. Prasad has published more than 40 academic papers on topics including the prevention of complications from LVADs, the use of radiofrequency ablation to treat atrial fibrillation and ways to improve the preservation of donor hearts used in transplants.

Dr. Prasad serves as Counsel for Cardiothoracic and Vascular Surgery of the American Heart Association, and is a member of the American Medical Association, the American College of Surgeons and the Society of Thoracic Surgeons and he will also serve as the UNOS certified heart transplant director.

Division of Abdominal Transplant and Liver Surgery
Roberto Hernandez-Alejandro, M.D.

Dr. Roberto Hernandez-Alejandro was the former Director of Liver Transplantation at Western University, Canada and an Associate Professor of Surgery and Oncology. Dr. Hernandez-Alejandro completed an abdominal transplant and hepato-pancreato-biliary (HPB) surgery fellowship from 2006-2008 at Western University, Canada. Subsequently, he received further training in live donor liver transplantation at the Kyoto University in Japan.

Over the past 8 years, Dr. Hernandez- Alejandro’s reputation for leadership and collaboration has helped to build one of the largest Transplant and Hepatobiliary Programs in Canada and is recognized in the broader surgical community nationally and internationally. He is a pioneer in liver resections for malignancy as well as Donation After Cardiac Death (DCD) Liver Transplantation.

His research endeavors are primarily focused on liver regeneration and donation after cardiac death. Dr. Hernandez-Alejandro has developed several protocols, as the principal investigator, in liver metastasis designed to improve the outcome in DCD’s. A pioneer in North America with the ALPPS procedure in the management of liver metastases, Dr. Hernandez-Alejandro is frequently invited by national and international academic centers to give guest lectures on the topic. He has more than 50 peer reviewed publications in the area of HPB and liver transplant.

Division of Colorectal Surgery
Larissa Temple, M.D.

Dr. Larissa KF Temple has been named Chief of the Division of Colorectal Surgery at UR Medicine and Director of SHORE. Dr. Temple completed General Surgery and Surgeon Scientist Program at the University of Toronto. She then moved to New York City and completed fellowships in Surgical Oncology at Memorial Sloan Kettering Cancer Center and Colorectal Surgery at St. Luke’s Roosevelt. Most recently she was a member of the Colorectal Surgery Service at Memorial Sloan Kettering Cancer Center. Dr. Temple has expertise in the management of colorectal diseases, and in particular, colorectal malignancies. She performs minimally invasive procedures, including robotic surgery to complex multi-surgeon pelvic procedures. Dr. Temple was the Director of the Colorectal Survivorship Program and the Vice Deputy Physician in Chief for Quality and Safety. She was named as one of New York City’s Top Doctors in 2016.

Dr. Temple has a national reputation in colorectal cancer and surgical quality. She presents nationally on outcomes after colorectal malignancies. She is a member of ASCO program committee and the American College of Surgeons Rectal Cancer Standards Operative Workgroup. Dr. Temple chairs the Quality Assessment Committee for the American Society of Colon and Rectal Surgery. She is a member of the Surgery Standing Committee for the National Quality Forum, the American College of Surgeons Performance Measurement Work group, the Society of Surgical Oncology Quality Committee and the planning committee for the Quality Symposium for the American Society of Clinical Oncology.


Division of Vascular Surgery
Kathleen Raman, M.D.

RamanThe UR Medicine Department of Surgery is pleased to announce the addition of Kathleen G. Raman, M.D., M.P.H. to our Division of Vascular Surgery. Dr. Raman is an Associate Professor of Surgery, Medical Director of the IAC-accredited noninvasive vascular laboratory, as well as an Associate Program Director for Research within the Department of Surgery.

Dr. Raman joins us from Washington University in St. Louis where she was an Assistant Professor of Surgery and a staff physician at the St. Louis VA Healthcare System and the Marion VA Medical Center.

In addition to being the recipient of several prestigious awards related to research and education, Dr. Raman has authored numerous publications and remains active as a peer reviewer of grants and journals. She is a Diplomate of the American Board of Surgery and American Board of Vascular Surgery. Dr. Raman is also certified by the American Registry for Diagnostic Medical Sonography and is a Registered Physician in Vascular Interpretation (RPVI).

Division of Abdominal Transplant and Liver Surgery
Koji Tomiyama, M.D.


Dr. Tomiyama completed his residency in surgery at Himeji St. Mary’s Hospital and a Fellowship in Liver and Kidney transplant surgery at Baylor Regional Transplant Institute. He also completed a Research Fellowship at Thomas E. Starzl Transplantation Institute, University of Pittsburgh in the Department of Surgery and an HPB fellowship at University of Toronto. Dr. Tomiyama was deeply involved in living donor liver transplant and served as assistant professor at Kyoto University.

Dr. Tomiyama’s clinical interests include complex HPB cases including in situ/ex vivo liver cold preservation, 3D simulation of liver surgery, donation after cardiac death (DCD) and live donor liver transplant. His basic research interests are primarily focused on liver regeneration and ischemia reperfusion injury. Throughout his career, he has published more than 30 peer reviewed articles as first and co- author and two book chapters on the subjects of live donor liver transplant techniques and cholangiocarcinoma. He has more than 15 presentations at International congress and one invited lecture.


Division of Pediatric Surgery
Derek Wakeman, M.D.


My experience includes minimally invasive surgical treatments for most pediatric surgical conditions. This way, kids have smaller scars, less pain and earlier return to full activity after surgery. In particular, I perform minimally invasive procedures in the chest and abdomen for inguinal hernia repair, appendectomy, gastrostomy, splenectomy, colectomy for inflammatory bowel disease, pull- through procedures for Hirschsprung’s disease, operations for malrotation, reflux (GERD) and pyloric stenosis. I also perform thoracoscopic and laparoscopic biopsies to better diagnose and treat a wide array of pediatric cancers. In addition, I help with vascular access (placing central IV’s) for chemotherapy.

From an academic perspective, I am interested in patient safety. My plan is to further improve safety and patient outcomes at Golisano Children’s Hospital. I also enjoy teaching medical students and residents, and will work with other pediatric surgeons to continue to educate the trainees about pediatric surgical disease. By working closely with my colleagues in the community to provide the best surgical care for kids, I hope we can continue to grow as a team.

I am American Board Certified in Surgery and in the process of obtaining board certification in Pediatric Surgery. 


Division of Thoracic and Foregut Surgery
Joseph Wizorek, M.D.


Dr. Wizorek joins us from the University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center where he was an Associate Clinical Professor, Department of Cardiothoracic Surgery in the Division of Thoracic and Foregut Surgery. He also held the positions of Chair, Department of Surgical Services and Director of Thoracic Surgery at the University of Pittsburgh Medical Center at Horizon, as well as Surgical Director at UPMC Horizon Lung Center and Lung Cancer Screening Program. Dr. Wizorek is a Board-certified Diplomate of the American Board of Surgery and is also certified by the American Board of Thoracic Surgery. In addition to being the recipient of several prestigious awards, including research grant awards, he has authored numerous publications and frequently presents on topics related to general thoracic surgery.