Physicians - Weight Loss

Gregory J. Mancini, MD
Dr. Gregory J. Mancini is the medical director for the University Bariatric Center. He joined the faculty as assistant professor of Surgery at the University of Tennessee in July 2006 after completing his fellowship training in Minimally Invasive Surgery at the University of Missouri.

His clinical practice and academic efforts focus on the areas of minimally invasive and bariatric surgery. He presents and teaches extensively, both regionally and internationally, on the topics of acid reflux, colonic disease and bariatric surgery.

Dr. Mancini has numerous publications to his credit in medical literature and actively participates in basic science and clinical research.

Matthew L. Mancini, MD
Dr. Matthew Mancini received his undergraduate degree from the University of Notre Dame and his medical degree from Mercer University in 1994.

He completed his general surgery residency in 1999 and soon after joined the faculty as assistant professor of Surgery at the University of Tennessee. Dr. Mancini was promoted to associate professor of Surgery in 2007.

Dr. Mancini is certified by the American Board of Surgery, he is a fellow of the American College of Surgeons, and he is involved in many surgical societies that promote education and surgical innovation.

He was recently elected to the board of the Knoxville Academy of Medicine.

Andrea Mariah Alexander, MD
Mariah Alexander, MD, joined the faculty at The University of Tennessee Medical Center as assistant professor in 2013, and her surgical focus includes minimally invasive techniques in general, endocrine, and bariatric surgery.

She has broad experience in laparoscopic foregut, colorectal, hernia, and bariatric surgery as well as training using the DaVinci robot in foregut and endocrine surgery.

She has co-authored two book chapters on laparoscopic hernia repair, participated in research on robotic simulation, and taught resident courses in The University of Tennessee Medical Center and Graduate School of Medicine Simulation Center. 

Nicole Kissane-Lee, MD, EdM, FACS

Dr. Nicole Kissane-Lee completed her undergraduate studies at the University of Virginia and then attended medical school at the Medical College of Virginia.  Dr. Kissane-Lee underwent residency training in General Surgery at the University of Florida.  Following this, she moved to Boston, Massachusetts to pursue additional subspecialty fellowship training in Advanced Laparoscopic and Bariatric Surgery at the Massachusetts General Hospital.  While in Boston, she also completed a fellowship in Medical Simulation at the Brigham and Women’s Hospital and received a Masters Degree in Education from Harvard University.  Dr. Kissane-Lee was an Assistant Professor of Surgery at Boston University prior to joining the Department of Surgery at the University of Tennessee.

Dr. Kissane-Lee is Board Certified by the American Board of Surgery and a Fellow of the American College of Surgeons.  She is an active member of the Society of American Gastrointestional and Endoscopic Surgeons and a member of the Advisory Committee for the Fundamentals of Laparoscopic Surgery.

Dr. Kissane-Lee’s clinical expertise is in minimally invasive and advanced laparoscopic techniques for bariatric and general surgery. Dr. Kissane-Lee’s academic focus is on surgical education and medical simulation.  She is the Assistant Director of the University of Tennessee Center for Advanced Medical Simulation, where she utilizes the latest developments in simulation to enhance learning opportunities for medical personnel throughout the region.

In her spare time, Dr. Kissane-Lee adores spending time with her family and is very excited to be living in Tennessee as part of the Volunteer Nation!