Clinical Leadership

Adam Barrison, MD, is President and Chief Physician Executive of Summit Health, a multispecialty medical group of more than 1,500 clinicians providing comprehensive primary and specialty care across New York and New Jersey. In this role, he oversees clinical strategy, physician leadership, and the continued evolution of Summit Health's value-based care and population health initiatives. He also serves as President of Summit Health Cares, the organization's philanthropic arm supporting community health, cancer research, and access-to-care programs throughout the communities Summit Health serves.

Dr. Barrison is a board-certified gastroenterologist who has practiced at Summit Health since 2001. He previously served as Vice Chair of the Board of Directors, was named Chief Physician Executive in 2019, and was promoted to President in 2025. His administrative portfolio includes oversight of physician engagement, clinical operations, compensation design, quality and safety, medical professional liability, and the integration of affiliated physician groups. He is a board member of Diamond Hill Insurance, Summit Health's captive risk retention group, and has been active in policy matters relating to physician practice, restrictive covenants, and ambulatory care delivery.

Dr. Barrison received his undergraduate degree from Columbia University and his medical degree from NYU Grossman School of Medicine. He completed his internal medicine residency at Beth Israel Deaconess Medical Center and his gastroenterology fellowship at Boston University Medical Center. He is a member of the American Gastroenterological Association and the Alpha Omega Alpha Honor Medical Society.

Jack V. Cappitelli, MD, has served as Chief Medical Officer, New Jersey Region, at Summit Health since 2020, and before that he was Regional Medical Director for Northern New Jersey. Prior to joining Summit Health in 2017, Dr. Cappitelli served for 14 years as President and Managing Partner at New Jersey Associates in Medicine, where he practiced as a board-certified internal medicine physician since 1998.
 
After completing his undergraduate education at Rutgers University, Dr. Cappitelli earned his Doctorate in Medicine from the University of Medicine and Dentistry of New Jersey Medical School. He received his Internal Medicine Training at the University of Medicine and Dentistry-Robert Wood Johnson Medical School, where he also earned the honor to serve as Chief Medical Resident and received an Outstanding Teaching Award.

Nicholas L. Pantaleo, MD is board-certified in family medicine and provides comprehensive care for patients of all ages. He earned his Bachelor of Science degree, magna cum laude, from the Sophie Davis School of Biomedical Education at the City University of New York Medical School at The City College of New York. He received his medical degree from Albany Medical College in Albany, New York, and completed his residency in family medicine at Jamaica Hospital Medical Center, where he was elected Chief Resident.

Prior to joining Summit Health (formerly Westmed Medical Group), Dr. Pantaleo served as Medical Director for Medisys St. Albans, part of Jamaica Hospital Medical Center.

Since 2019, Dr. Pantaleo has held key leadership roles in primary care, helping to guide clinical operations, physician engagement, and strategic growth initiatives across the organization. In 2021, following the partnership transaction with Summit Health, he was appointed Service Line Chief of Internal and Family Medicine, where he played an instrumental role in integrating teams, advancing care delivery, and strengthening alignment across practices.

Dr. Pantaleo is a member of the American Academy of Family Physicians and is recognized for his commitment to high-quality, patient-centered care and physician leadership.