Demetris Delos, MD

  • College: Cooper Union College, School of Engineering, New York, NY
    Binghamton University, Binghamton, NY
  • Medical School: Weill Medical College of Cornell University, New York, NY
  • Residency: Orthopedics, Hospital for Special Surgery, New York, NY
  • Fellowship: Sports Medicine and Shoulder Surgery, Hospital for Special Surgery, New York, NY
Demetris Delos, MD is a fellowship trained, board-certified orthopedic surgeon who specializes in knee, shoulder and elbow conditions. He is a nationally recognized leader in sports medicine and knee and shoulder surgery, with over 30 peer-reviewed articles and more than 50 national and international presentations. He has authored or co-authored more than five textbook chapters.

Dr. Delos has a particular interest in minimally invasive methods of shoulder surgery and complex knee preservation surgery, including revision surgery for torn ligaments, meniscal and cartilage transplantation, and joint replacement (both partial and total). He also has a particular interest in biologic forms of treatment, such as platelet rich plasma (PRP) and stem cell therapy, and has conducted seminal research on the topic.

As an athlete whose playing career was affected by a serious knee injury, Dr. Delos works with competitive athletes and weekend warriors to help them achieve their goal of returning to highest levels of activity possible. He has extensive experience caring for athletes of all competitive levels, including professional, college and high school athletes. He is a former assistant orthopaedic surgeon for the NY Giants Football team and is currently the team physician for the Purchase College Athletic Department and the Westchester Flames semi-professional soccer team. He also serves as a team physician for many local high schools, including Greenwich High School and Iona Prep.

Dr. Delos earned his medical degree from Weill Medical College of Cornell University and completed his orthopaedic residency at Hospital for Special Surgery (HSS)/New York-Presbyterian Hospital. He completed a research fellowship at the HSS Laboratory for Soft Tissue Research as well as a surgical fellowship in Sports Medicine and Shoulder Surgery at HSS, where he was Chief Administrative Fellow.

Make an appointment on Zocdoc


Cllick here to request an appointment.


After years of PT, 2 surgeries that did not help, & numerous steroid injections I finally found ONS & Dr Delos. I WISH I had found him earlier! He listened to my story, understood MY situation & MY needs, evaluated MY condition & found a solution. He presented options & explained them all thoroughly. We made the decision together to undergo a partial knee replacement & WOW what a difference. At 7 months I walked a half marathon with NO ill effect, & I am back bike riding and hiking. And did I mention that this was an opioid free surgery – I did not need ANY strong painkillers – even in the hospital, I felt very little pain at all, I was only taking Tylenol!!! And as for the scar on my knee – what scar – you can barely see it! Thank you ONS and Dr Delos. (5 Star Review on Google from Gail W.)

View All Testimonials

Watch Dr. Delos’ January, 2016 appearance on Health IQ with Dr. Siegel.

Read about a distinguished panel including Dr. Delos on the subject of maximizing a child’s athletic potential.


Former Assistant Instructor in Orthopaedics, Weill Medical College of Cornell University

American Academy of Orthopaedic Surgeons
American Orthopaedic Society for Sports Medicine
Arthroscopy Association of North America
Orthopaedic Research Society

Former NFL Assistant Team Physician, New York Giants: 2012-2013
Former Assistant Team Physician, Iona College: 2012-2013
Former Team Physician New York City Public School Athletic League (PSAL) Football: 2009-2012

American Academy of Orthopaedic Surgery  – Board Certified

AOA Emerging Leaders Forum, 2012
AOA-OREF Resident Leadership Forum, 2011
AAOS/OREF/ORS Clinician-Scientist Development Program, 2011
AOSSM Young Investigator Grant recipient, 2010
Rudin Foundation Grant recipient, 2010
Hellenic Medical Society Scholarship, 2002
George N. Papanicolaou Scholarship, 2001
Phi Beta Kappa, 2000
Golden Key National Honor Society, 1999


Read More