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Meet Our Residents

The Department of Neurological Surgery's residents for 2018-2019 are:

PGY-7, Chief Resident

Michelle Paff, MD, received her bachelor's degree from UC Irvine and went on to earn her medical degree at Drexel University College of Medicine (formerly MCP Hahnemann) in Philadelphia, Penn. As a neurological surgery resident, Paff has a great passion for the field and its subspecialties, including endovascular, pediatric neurosurgery, stereotactic radio-surgery and functional neurosurgery. Paff’s interest is in primary and metastatic brain tumors. In addition to neurosurgery, she has a passion for the arts.

Dr. Michelle Paff, UC Irvine neurosurgery resident


John Roufail, MD, completed a neurosurgery residency and clinical training in Egypt, where he earned a master's degree in surgery and PhD in cerebrovascular surgery research. At Oregon Health & Science University in Portland, he was a fellow in skull base and cerebrovascular surgery research. As a pediatric neurosurgery clinical fellow at the Cleveland Clinic in Ohio, he studied the dynamics of cerebral spinal fluid and cerebral blood flow. As a neurological surgery resident at UC Irvine, he is interested in endoscopic skull base surgery, cerebrovascular surgery, spine surgery, epilepsy and movement disorder surgeries. He also enjoys swimming, scuba diving and community service.

Dr. John Roufail, UC Irvine neurosurgery resident


George Hanna, MD, earned his bachelor’s degree from UCLA, where he graduated summa cum laude with departmental and college honors and was inducted into Golden Key honor society and Phi Beta Kappa. He moved on to Saint Louis University School of Medicine, where he earned his medical degree and was inducted into Alpha Omega Alpha, the national medical honor society, graduated with distinction in research and was inducted into Alpha Sigma Nu, the national Jesuit honor society. During medical school, he earned multiple scholarship awards including the 2010 Pauletta and Denzel Washington Family Gifted Scholars Program in Neuroscience Award and the 2012 AMA Foundation Physicians of Tomorrow Award. His primary interests in neurological surgery include the skull base, vascular and neuro-oncology subspecialties. He is passionate about advocacy and helping underprivileged patients. In his spare time, he enjoys traveling, spending time with friends and family, and participating in sports and outdoor activities.

George Hanna


Kieu Tran, MD, earned a bachelor's degree from the University of Missouri, Kansas City, and a medical degree at the University of Utah, where she was awarded the Andrew J. and Carolyn Rice Schilly Endowed Scholarship, which is given to students for academic excellence. She is a member of the American Medical Association, Utah Medical Assocation, American College of Physicians, and American Medical Women's Association. She actively participated in a number of community and academic career opportunities while in Utah and throughout her life. She enjoys the outdoors, traveling and Broadway shows. She also has a passion for helping people in greatest need.

Dr. Kieu Tran, UC Irvine neurosurgery resident


Nathan Oh, DO, earned bachelor's degrees in economics, philosophy and biochemistry, and studied at UC Irvine and UCLA. After graduation, he worked as an investment banker prior to attending medical school. He earned his doctor of osteopathy degree from A.T. Still University School of Osteopathic Medicine in Mesa, Ariz. He has been nominated and selected as a member of the Golden Key honor society, Phi Beta Kappa honor society and Sigma Sigma Phi medical honors fraternity. He is also a co-recipient for a National Institutes of Health grant for his research in tumor biomarkers. As a former Division I athlete and Junior Olympian, he is an active community role model. In his free time he enjoys traveling, photography, playing and watching sports, watching movies and participating in community service activities in underserved areas.

Nathan Oh


Benjamin Ball, MD, attended both college and medical school at the University of Virginia in Charlottesville. He was awarded the Merck Manual Award in his second year for outstanding academic achievement. His primary interest is in brain tumor surgery. In his spare time he enjoys watching NCAA basketball, critiquing movies and reading Stephen King novels.

Dr. Benjamin Ball, UC Irvine neurosurgery resident


Joseph Falcone, MD, attended University of Washington School of Medicine in Anchorage, Alaska. He was awarded the UW School of Medicine Service Award in May 2014 in recognition of contributions to service learning, community service and advocacy in underserved communities. He is a published physician and has an interest in research.

Joseph Falcone, MD, UC Irvine neurosurgery resident


Jordan Xu, MD, attended Case Western Reserve University School of Medicine in Cleveland, Ohio. He was awarded the Crile Research Award in 2014. He enjoys rock climbing, reading and traveling.

Jordan Xu


Alvin Chan, MD, was born and raised in Southern California. He went to UCLA for undergraduate and the Medical College of Wisconsin for medical school. His research focus has been on spine and functional neurosurgery. His hobbies and interest include basketball and spending time with his friends and family.