More

Sports Medicine Physicians

The nationally recognized physicians at St Charles are sports medicine experts in several medical specialty areas, including Physical Medicine and Rehabilitation, Family Medicine, Primary Care, Orthopedics and Orthopedic Surgery.


Danielle N. DeGiorgio, D.O., FAAPMR

Danielle DeGiorgio, DO, is a native of Long Island, graduating from Longwood High School as a three-sport athlete. She attended Stony Brook University on a full athletic scholarship and served as captain of the women’s basketball team.

After obtaining her medical degree from New York College of Osteopathic Medicine, Dr. DeGiorgio completed an internship at Brookhaven Memorial Hospital, followed by a residency in Physical Medicine and Rehabilitation (PM&R) at Stony Brook University Medical Center, serving as chief resident in her senior year.  In addition, Dr. DeGiorgio completed training in structural acupuncture at Harvard Medical School.  Following her residency, Dr. DeGiorgio went on to complete a Fellowship in Sports Medicine at Christiana Care, serving as a Fellow team physician for the University of Delaware, Delaware State University, as well as for local high school football and wrestling teams.

Dr. DeGiorgio is dual board certified in PM&R and Sports Medicine.  She is a member of the American Academy of Physical Medicine and Rehabilitation, the American Medical Society for Sports Medicine and the American College of Sports Medicine.


Mark Harary, M.D.

Mark Harary, M.D. earned his undergraduate degree in Movement Science from the University of Michigan in 1998. He went on to medical school at Ross University, where he graduated with honors in 2002. After obtaining his medical degree, Dr. Harary completed a family medicine residency at UPMC Shadyside Hospital in Pittsburgh, PA. He then completed his fellowship training in Sports Medicine at Blessing Hospital in Quincy, IL. Dr. Harary is board certified in Sports Medicine and Family Medicine. He is a member of the American Medical Society of Sports Medicine and the American Academy of Family Physicians. Dr. Harary is actively involved with the Arthritis Foundation. He has given numerous educational talks on arthritis and has served on the planning committee for the annual Arthritis Walk for several years, serving as the Walk Chair for the NYC Arthritis Walk in 2014.

Dr. Harary specializes in the non-operative treatment of musculoskeletal problems in both pediatric and adult patients. He has a special interest in treating osteoarthritis, fractures, acute injuries and concussions. He enjoys helping his patients return to, and maintain, active lifestyles. Dr. Harary is a concussion specialist with St.Charles Hospital's ThinkSMART!™ Concussion Management Program and serves as the team physician for the Miller Place High School football team.


Hayley Rintel Queller, M.D., P.C.

Dr. Hayley Queller is the first Primary Care Sports Medicine physician at St. Charles. In 2000, she completed an undergraduate degree in mathematics at Franklin & Marshall College where she was valedictorian of her class, as well as, a first team Academic All-American soccer player. She earned her medical degree from Georgetown University School of Medicine in 2004 after which she completed a dual residency in Internal Medicine and Pediatrics at the Christiana Care Health System in Delaware. She continued her training at Christiana Care by completing a fellowship in Primary Care Sports Medicine. She is a member of the American Academy of Pediatrics, the American College of Physicians and the American Medical Society for Sports Medicine. Dr. Queller has published extensively on both orthopedic and medical topics throughout her training.

Dr. Queller specializes in the non-operative management of orthopedic issues in all ages. She has a keen interest in injury prevention and rehabilitation from non-operative conditions. She also has a particular interest in fracture care and concussion management. She serves as the Medical Co-Director of St. Charles Hospital’s ThinkSMART!™ Concussion Management Program and helps ensure the most up to date management of concussion in more than 42 school districts in Suffolk County. She is eager to watch her patients get back to an active lifestyle.


Anthony Cappellino, MD

Dr. Cappellino, a Long Island native, grew up in New Hyde Park, New York. He was the No.1 football player in Nassau County in 1983 receiving the Tom Thorpe Award. Dr. Cappellino attended Yale University and participated all four years in football. He was awarded the Chester J. Laroche scholar-athlete award. He obtained his medical degree from SUNY Stony Brook with honors where he was elected into the Alpha Omega Alpha medical honor society in 1992. He received his orthopaedic residency training at Yale-New Haven Hospital where he served as Chief resident in his final year. His post-graduate training led him to a fellowship in sports medicine at the prestigious Kerlan-Jobe Clinic in Los Angeles serving as assistant team physician for the Los Angeles Lakers, Los Angeles Dodgers, Los Angeles Kings, Anaheim Angels and the USC Trojan football team.

Dr. Cappellino is actively involved in his community where you will see him on the sidelines taking care of multiple local High School football teams. Dr. Cappellino is board certified by the American Board of Orthopaedic Surgeons in both Orthopaedic Surgery and Sports Medicine. Dr. Cappellino is the Chairman of Orthopaedic Surgery at Good Samaritan Hospital Medical Center in West Islip, NY.


Gregg J. Jarit, MD

Dr. Jarit is an orthopedic surgeon specializing in the orthopedic care of athletes at all levels. He also performs general orthopedic surgical and nonsurgical fracture care. He has particular interest in the care of acute and chronic sports-related injuries, including conservative, arthroscopic, and minimally invasive surgical treatment. He has experience with the latest techniques in facilitating early return to play while maximizing the function and safety of the athlete. He recently received an additional subspecialty certification in Orthopedic sports medicine.


Michael Sileo, MD
Director, Sports Medicine, St. Charles

Dr. Sileo has a particular interest in the care of both the competitive and recreational athlete. He is actively involved in the community, and can frequently be found taking care of athletes on the sideline of several local football teams. He specializes in the arthroscopic and minimally invasive treatment of shoulder, hip, knee, and elbow injuries, but has extensive experience in most areas of both operative and non-operative orthopedics. Dr. Sileo is one of the few orthopaedic surgeons in the tri-state area who routinely performs hip arthroscopy for the minimally invasive treatment of hip labral tears and femoroacetabular impingement. Dr. Sileo's practice emphasizes both rehabilitation as well as training to prevent sports related injuries. His other areas of interest include the treatment of cartilage and meniscal injuries, shoulder arthroplasty, and fracture care.