Our Physicians

Sanjay Ghosh, MD

Sanjay Ghosh, MD

Medical Director, Neurosurgery

Dr. Sanjay Ghosh was born and raised in the suburbs of Detroit, Michigan where he attended North Farmington High School. Dr. Ghosh graduated from North Farmington in the top 1% of his class with awards for being the outstanding student in both mathematics and science. He also was honored to receive the award for outstanding overall graduate from the faculty and his fellow students. During this time, Dr. Ghosh was invited to join MENSA.

Dr. Ghosh received a Regents Alumni Merit Scholarship to attend the University of Michigan Honors College. Dr. Ghosh completed his studies in cellular and molecular biology in just three and a half years, graduating Magna Cum Laude and Phi Beta Kappa for placing in the top 5% of his class. In college, he received competitive research grants, and a portion of his college honors thesis was published in the peer reviewed scientific Journal of Hypertension. He went on to attend medical school at the University of Michigan where he was exposed to the field of neurosurgery, and later gained acceptance to the top-rated neurosurgery residency program at the University of Southern California. While a resident at USC Dr. Ghosh gained training and considerable expertise in the arenas of spinal surgery, cranial and spinal trauma, radiosurgery, and cranial base surgery.

During his residency, Dr. Ghosh completed a fellowship in skull base surgery at the House Ear Clinic under the guidance of Drs. William Hitselberger and John Diaz Day. During this time, he spent hundreds of hours in the laboratory mastering the surgical techniques that are necessary for safe and effective treatment of acoustic neuromas, skull base meningiomas, pituitary adenomas, and cerebral aneurysms. He also performed detailed analysis of the use of endoscopes in skull base surgery and presented this work at several national conferences. Due to his training and expertise in skull base surgery, Dr. Ghosh was then recruited by the physicians of the SENTA Clinic in San Diego to create the only multidisciplinary skull base surgery team in San Diego County. In 2007, Dr. Ghosh was named one of America’s Top Surgeons by the Consumers Research Council.

Dr. Ghosh has been named one of San Diego’s top neurosurgeon by the physicians of the San Diego County Medical Society eight times (2010, 2011, 2014, 2015, 2016, 2017, 2018, 2019). He has been named one of the top neurosurgeons in the nation by Castle Connolly eleven times (2010 to 2020). In 2016, Dr. Ghosh was honored to be appointed the codirector of the neurotrauma program at Scripps Mercy Hospital, as well as the chief of neurosurgery for that same facility.

Scott P. Leary, MD

Scott P. Leary, MD

Co-Medical Director, Neurosurgery

Dr. Scott P. Leary is a spine fellowship trained neurosurgeon at the SENTA Clinic. His clinical practice and research focuses on the comprehensive care of spinal disorders, including spinal stenosis, degenerative disc disease, spinal trauma, scoliosis, failed spine surgery syndrome, spinal tumors, and the evaluation of neck and back pain. He completed both neurosurgical spine training and an advanced orthopedic spine fellowship, a distinct combination that is unique in the San Diego medical community.

Dr. Leary was born in Vancouver and raised in Calgary, Alberta, Canada. He was awarded an academic scholarship to attend Brigham Young University where he graduated with honors. He obtained his medical degree from the prestigious Washington University in St. Louis, where his medical school class was ranked #1 in the nation. He completed neurosurgery training at the Los Angeles County – University of Southern California Medical Center in Los Angeles, California. During his training he concluded a fellowship in Stereotactic Radiosurgery under the guidance of Dr. Michael Apuzzo, one of the most respected and decorated neurosurgeons in the world today. Dr. Leary also spent a year as Clinical Instructor of Neurosurgery for the Los Angeles County Hospital, a level one trauma center.

Dr. Leary completed a complex spine fellowship with renowned orthopedic surgeon Dr. John Regan in Los Angeles. During his fellowship he gained expertise in minimally-invasive spine surgery, artificial disc replacement, endoscopic spine surgery, dynamic spinal stabilization, and complex spinal reconstructive procedures.

Accomplishments include publishing several articles in peer-reviewed journals, including three special articles that were featured on the cover of the international journal Neurosurgery. He also travels the country to educate other surgeons on the nuances of spinal instrumentation and reconstruction.

Maintaining his commitment to cutting edge innovation, Dr. Leary is active in clinical research and currently serves as the principal investigator for three national FDA clinical trials for the treatment of symptomatic degenerative disc disease and spinal stenosis.

Since joining the SENTA Clinic, Dr. Leary has been honored as one of America’s Top Surgeons by the Consumers Research Council. He has been featured on television and in print as an expert on brain tumors and back pain, and for performing novel surgical procedures. He was honored as a finalist for the Health Care Champion Award for Innovation and Research in San Diego by the San Diego Business Journal.

Most recently Dr. Leary was selected to be on the cover of the 2009 Scripps Annual Report.  The photo featured on the cover of the report was then chosen by Scripps Hospital for a marketing campaign that included more than 80 billboards throughout San Diego County, bus stop signs and internet banners.  The story which appeared in the 2009 report went on to be highlighted in multiple newspaper articles, a radio ad and two morning shows; San Diego 6 Morning Show and KUSI Morning Show.

Sharona Ben-Haim, MD

Sharona Ben-Haim, MD

Sharona Ben-Haim, MD, is a neurosurgeon who specializes in caring for people with treatment-resistant epilepsy and movement disorders such as Parkinson’s disease, dystonia and essential tremor and spasticity. She also treats chronic pain, including facial pain and trigeminal neuralgia, as well as pain related to spinal conditions.

Dr. Ben-Haim performs deep brain stimulation (DBS) surgeries, including “awake” microelectrode-guided DBS and “asleep” MRI- and CT-guided DBS.

She is an expert in leading-edge surgical epilepsy treatments, including selective temporal lobectomies, responsive neurostimulation, and MRI-guided laser induced interstitial thermotherapy (laser ablation) for treatment-resistant epilepsy as well as gamma knife radiosurgery.

Dr. Ben-Haim’s research is focused on novel tools that will help localize and treat epileptic seizures more selectively using minimally invasive techniques. Dr. Ben-Haim’s work in movement disorders and improvements in technique for deep-brain stimulation insertion has been published in numerous peer-reviewed journals, including European Spine JournalNeurosurgeryJournal of Craniofacial SurgeryWorld NeurosurgeryPediatric NeurosurgeryNeuropathology, and Stereotactic and Functional Neurosurgery. In 2014, she authored a book chapter for Textbook of Cortical Brain Stimulation.

Dr. Ben-Haim has been invited to present nationally on topics including risk factors for hemorrhage during deep brain stimulation and occupational hazards in neurosurgical training. She also serves as a neurotrauma consultant to the NFL.

She completed a fellowship in epilepsy and functional surgery at Yale School of Medicine in New Haven, Connecticut, and was a visiting fellow in functional neurosurgery at University of Oxford in Oxford, England. Dr. Ben-Haim completed residency training in neurosurgery at Mount Sinai Medical Center in New York. She earned her medical degree from UC San Diego School of Medicine.

Dr. Ben-Haim has received several awards over the years, including the Robert E. Hertzka Student Leadership Award from the San Diego County Medical Society, and the Grace Fimognari Memorial Award from the Department of Molecular and Cell Biology, Honors Research Committee at University of California, Berkeley. She serves as neurosurgeon liaison to the executive committees for the American Society for Stereotactic and Functional Neurosurgery and the Pain Section of the American Association of Neurological Surgeons

Gunjan Goel, MD

Gunjan Goel, MD

Dr. Goel completed her undergraduate work at University of California, Berkeley in psychology. After completing medical school at Wayne State University, she completed her internship and residency at University of California, San Diego Medical Center. Dr Goel supplemented her neurosurgical training with two enfolded fellowships, one in minimally invasive skull base surgery/ neuro-endoscopy at Weill Cornell University with Dr Theodore Schwartz and second, in skull base microneurosurgery at Surgical Innovations Laboratory at Weill Cornell University Medical College with Dr Antonio Bernardo.

Michael O’Leary, MD

Michael O’Leary, MD

Dr. Michael O’Leary specializes in diseases of the ear and balance. He helped create the new ChEARS Hearing Center that offers hearing healthcare with advanced hearing aids, assistive listening devices and implants. His skull base role is that of neurotologist, focusing on tumors of the lateral skull base such as acoustic neuromas and meningiomas. He is also a nationally-recognized leader in the development of minimally invasive techniques including the endoscopic removal of pituitary tumors.

Michael J. O’Leary, MD was born in 1954, in Denver, Colorado and grew up in New York. He graduated from Scarsdale High School in Scarsdale New York with honors in 1972.  He began his medical career in New York, earning his bachelor’s degree in biology from the University of Rochester in 1976 (Cum Laude) followed by his doctorate of medicine from Georgetown Univ., Washington, DC in 1980 (Magna Cum Laude).

During medical school in 1976 he entered the US Navy as an Ensign (0-1), the start of a 24-year career. Following internship and residency at the Naval Hospital San Diego in 1986, he was assigned as Chief, Otolaryngology/Head and Neck Surgery at Naval Hospital Newport, RI until 1989 (the “head and tail” of the department). He then underwent subspecialty training in Neurotology/Skull Base Surgery beginning as a Clinical Fellow at the prestigious House Ear Clinic in Los Angeles. This was followed by a year of Microvascular surgery at Washington University in St. Louis, MO with Dr. Richard E. Hayden. In 1991 he returned to Naval Hospital San Diego as the Chief, Neurotology/Skull Base Surgery. Upon his retirement in 2000 as a Captain (0-6), his neurotology division had grown from one to a team of over 25 individuals, performing pioneering clinical and basic science research focused on disorders of the ear and skull base.

Doctor O’Leary is board-certified by the American Board of Otolaryngology/Head & Neck Surgery, a fellow of the American College of Surgeons, and a clinical assistant professor of surgery with the Uniformed Services University of Health Science. He is a past chairman of the Skull Base Surgery committee of the American Academy of Otolaryngology/Head & Neck surgery and has served as consultant to the Surgeons General.

Honors include membership in AOA – the honor medical society, and he is a recent recipient of the AAO/HNS honor award. He is a member of numerous medical associations, and has served as president of the San Diego Society of Otolaryngology/Head & Neck Surgery, the Society of Military Otolaryngologists, and the House Fellowship Alumni group. Military decorations include the Navy Commendation Medal, the Navy Achievement Medal and the Navy Meritorious Service Medal. He is also an Eagle Scout.

Doctor O’Leary has authored or presented more than 90 scientific works focused on the ear and skull base, including 10 book chapters. He is a champion of digital advances in medicine and an opinion leader regarding process improvement and practice effectiveness in medicine.

Kenneth Shimizu, MD

Kenneth Shimizu, MD

Kenneth Shimizu, MD, is a radiation oncologist with expertise in Gamma Knife and CyberKnife treatment, intraoperative radiation therapy (IORT) and managing the care of patients with breast, prostate, skin and brain tumors.

In addition to his clinical practice, Dr. Shimizu conducts research on stereotactic radiosurgery and the treatment of breast cancer with IORT. He also stays informed on new technology to deliver the most advanced care to patients. He believes in compassionate care and working collaboratively with specialists to determine the best, most comprehensive treatment. 

Dr. Shimizu has always been fascinated by science, specifically genetics and molecular biology. He has also always had an interest in helping people and doing things to benefit others. In medical school, these two interests lead him toward a specialty in oncology. During his rotation in radiation oncology, he knew he had found his calling. Fighting cancer is both a scientific and human endeavor, and his objective is to win the fight with science and compassion.

In his spare time, he enjoys playing basketball, trying new foods and spending time with his family.

Marc Schwartz, MD

Marc Schwartz, MD

Clinical Professor of Neurosurgery
University of California San Diego

A graduate of Harvard Medical School, Dr. Schwartz completed his residency in neurological surgery at Brigham and Women’s and Children’s Hospitals in Boston. He then completed a fellowship in Skull Base Surgery at Oregon Health Sciences University in Portland. He has been in practice since 1998, first as Assistant Professor of Surgery and director of the Skull Base Program at Albany Medical College in New York. He then practiced in Los Angeles as an associate and partner at the House Clinic. In 2017, with his acceptance of an academic appointment at UCSD, his practice relocated to San Diego.

Dr. Schwartz has been certified in Gamma Knife Radiosurgery since 2002 and has been recertified for use of the Perfexion and Icon systems. He has extensive experience in the treatment of all brain tumors and has particular interest in the treatment of skull base tumors, including acoustic neuromas, meningiomas, cranial nerve schwannomas, and other rare tumors.

Dr. Schwartz’ skull base practice draws nationally and internationally. He is committed to patient-centered care, determining with the patient the best treatment options on an individualized basis.

San Diego Gamma Knife Center

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