NYC Health + Hospitals/Jacobi | North Central Bronx Appoints Grace Hyun, MD as Chief of Urology and Nassir Mansour, MD as Chief of Neurosurgery

NYC Health + Hospitals/Jacobi | North Central Bronx Appoints Grace Hyun, MD as Chief of Urology and Nassir Mansour, MD as Chief of Neurosurgery

Both appointments became effective on January 1

Jan 28, 2026

NYC Health + Hospitals/Jacobi | North Central Bronx today announced the appointments of Grace Hyun, MD as Chief of Urology and Nassir Mansour, MD as Chief of Neurosurgery. Dr. Hyun succeeds Dr. Judy Siegel, and Dr. Mansour enters the role after Dr. Nrupen Baxi's service as Acting Director of Neurosurgery. Both appointments became effective on January 1.

Dr. Hyun joins Jacobi and North Central Bronx Hospitals from NYU Langone, where she served as the Director of Pediatric Urology and held the academic rank of Associate Professor. A graduate of Cornell University Medical College, Dr. Hyun completed her Urology residency at Columbia University, followed by a fellowship in Pediatric Urology at the Children's Hospital of Philadelphia. In addition to her publications in both pediatric and general urology, she is an acclaimed educator who has received multiple teaching awards. Dr. Hyun is nationally recognized as a leader in her field, serving on numerous regional and national committees, in addition to being named "Top Doctor" by Castle Connolly and "Best Doctor" by New York Magazine consistently for over a decade.

Dr. Mansour most recently served as Chief of Neurosurgery at Wyckoff Heights Medical Center and previously served as Director of Neurosurgery at Mount Carmel Healthcare in Columbus, Ohio. He earned his medical degree from Omdurman Islamic University in Sudan and completed a General Surgery residency at the Royal College of Surgeons in Ireland before his Neurological residency at the University of Chicago. He further specialized by completing a Skull Base Fellowship at Indiana University, and as a dedicated researcher, Dr. Mansour has published and presented extensive research studying gliomas. Dr. Mansour's philosophy is to "always put my patients first and treat them the same way I want my family to be treated," bringing a patient-centered approach to the surgical team.

"Doctors Hyun and Mansour are well respected national level leaders, and Jacobi/NCB is thrilled to have them join us in their leadership roles," said NYC Health + Hospitals/Jacobi | North Central Bronx's Chief of Surgery Dr. John McNelis. "We extend our deepest gratitude to Dr. Judy Siegel, for her tireless leadership, clinical skill, and continued support during this transition. We would also like to thank Dr. Nrupen Baxi for his dedicated service as Acting Director of Neurosurgery during this transitional period."

For more information, please contact for Jacobi Hospital and for North Central Bronx Hospital.

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MEDIA CONTACT: Catherine Diaz, NYC Health + Hospitals/Jacobi | North Central Bronx,

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About NYC Health + Hospitals/JacobiNYC Health + Hospitals/Jacobi is a 457-bed teaching hospital affiliated with the Albert Einstein College of Medicine. The facility has earned numerous Center of Excellence designations, accreditation, and recognition for its renowned Level 1 Trauma Center, Burn Center, Surgical Intensive Care Unit, regional Stroke Center, Snakebite Treatment Center, Breast Health Center, Bariatric Surgery Center, and Cancer Service. The facility also offers the region's only multi-person hyperbaric chamber, allowing up to nine patients to dive together at one time. Jacobi Hospital's Ambulatory Care Pavilion is a stunning complement to its inpatient acute care, allowing staff to provide patients with high-quality service in a modern, state-of-the-art environment. For more information, visit https://www.nychealthandhospitals.org/jacobi.

About NYC Health + Hospitals/North Central BronxNYC Health + Hospitals/North Central Bronx is a member facility of the NYC Health + Hospitals system, one of eleven acute care facilities within the City of New York. A 215-bed community hospital, North Central Bronx Hospital specializes in women's and children's services. It also provides Behavioral Health acute and ambulatory care. Its busy outpatient department has led the way in community-based care delivered in a compassionate and culturally-appropriate manner. Its Labor and Delivery service safely brings more than 1,000 babies into the world each year. North Central Bronx Hospital is committed to providing safe, high-quality medical care for any and all in need. For more information, visit https://www.nychealthandhospitals.org/north-central-bronx.

About NYC Health + Hospitals
NYC Health + Hospitals is the largest municipal health care system in the nation serving more than a million New Yorkers annually in more than 70 patient care locations across the city's five boroughs. A robust network of outpatient, neighborhood-based primary and specialty care centers anchors care coordination with the system's trauma centers, nursing homes, post-acute care centers, home care agency, and MetroPlusHealth-all supported by 11 essential hospitals. Its diverse workforce of more than 46,000 employees is uniquely focused on empowering New Yorkers, without exception, to live the healthiest life possible. For more information, visit www.nychealthandhospitals.org and stay connected on Facebook, Twitter, Instagram and LinkedIn.