After-Hours Urgent Ortho Care is now available in Wilton, Monday to Friday from 4:00 pm to 7:00 pm and Saturdays from 12:00 to 4:00 pm. Walk-ins welcome.

Demetris Delos, MD

Sports Medicine
Clinical Interests

Shoulder, Elbow, Knee Surgery; Joint Preservation Surgery, Joint Replacement Surgery

Located In

Greenwich, Stamford


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. Dr. Delos has 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 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 the 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. Dr. Delos also serves as a team physician for many local high schools, including Byram Hills High School, Greenwich High School, Iona Prep and Manhattanville College.

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.

  • Commercial Plans (Including APCN Plus, We do not accept regular APCN)
  • Managed Medicare
Anthem Blue Cross Blue Shield of CT
  • Commercial and Exchange
  • Managed Medicare
Blue Cross Blue Shield (Plans Outside CT)
  • Cards with the “PPO” inside the suitcase logo
CarePartners of Connecticut
  • Managed Medicare (HMO/PPO)
  • Commercial, MetroNY, and LocalPlus
  • Cigna+Oscar, Cigna+MVP (CT Locations Only)
  • Commercial and Exchange (Except “Value” Network)
  • Managed Medicare
Connecticut Medicaid
Connecticut State Workers’ Compensation
  • Emblem Commercial and Exchange (Except for Millennium and Enhanced Care Prime Networks)
  • Managed Medicare (VIP Prime, Bold, Reserve)
Harvard Pilgrim
  • Through United Shared Services – ONS Harrison location only.
Medicare (Including Railroad Medicare)
  • Liberty and Freedom Plans
UHC/NYSHIP/NY Government Empire Plan
United Healthcare
  • All Commercial Plans (Except Indemnity and Compass)
  • Managed Medicare

Orthopaedic & Neurosurgery Specialists (ONS) accepts most major insurance plans. Please see the list of accepted insurance plans above and confirm that ONS participates with your plan prior to scheduling an appointment. Certain insurance plans are limited to specific regions and physicians. If you have additional questions, please call our offices at (203) 869-1145 ext. 279 and our team will be happy to provide additional information.


Fellowship in Sports Medicine and Shoulder Surgery: Hospital for Special Surgery, New York, NY

Medical School

Weill Medical College of Cornell University, New York, NY


Residency in Orthopaedics: Hospital for Special Surgery, New York, NY


Cooper Union College, School of Engineering, New York, NY

Binghamton University, Binghamton, NY

  • American Board of Orthopaedic Surgery: Orthopaedic Surgery Board Certification

  • American Academy of Orthopaedic Surgeons
  • American Board of Orthopaedic Surgery
  • American Orthopaedic Society for Sports Medicine
  • Arthroscopy Association of North America
  • Orthopaedic Research Society
  • AOA Emerging Leaders Forum, 2012
  • AAOS/OREF/ORS Clinician-Scientist Development Program, 2011
  • AOA-OREF Resident Leadership Forum, 2011
  • Phi Beta Kappa, 2000
  • Golden Key National Honor Society, 1999


  • Weill Medical College of Cornell University, Assistant Instructor in Orthopaedics
Team Physician Responsibilities
  • Bryam Hills High School, Team Physician
  • Greenwich High School, Team Physician
  • Iona Prep, Team Physician
  • Manhattanville College, Team Physician
  • Iona College, Assistant Team Physician, 2012–2013
  • New York Giants, NFL Assistant Team Physician, 2012–2013
  • New York City Public School Athletic League Football, Team Physician, 2009–2012

  • Castle Connolly Top Doctor in the NY Metro area, 2021-Present
  • Greenwich Magazine, Top Doctor in Fairfield County, 2021-Present
  • Stamford Magazine, Top Doctor in Fairfield County, 2021-Present
  • New Canaan/Darien Magazine, Top Doctor in Fairfield County, 2021-Present
  • Westport Magazine, Top Doctor in Fairfield County, 2021-Present
  • AOSSM Young Investigator Grant recipient, 2010
  • Rudin Foundation Grant recipient, 2010
  • Hellenic Medical Society Scholarship, 2002
  • George N. Papanicolaou Scholarship, 2001

  • Chaudhury S, Dines JS, Delos D, Warren RF, Voigt C, Rodeo SA. The role of fatty infiltration in the pathophysiology and outcomes of rotator cuff repairs: A review article. Arthritis Care Res 64(1):76082, 2012.
  • Delos D, Rodeo SA. Successful fusion of the proximal tibio-fibular joint with osteogenic protein-1 (OP-1) augmentation. HSS Journal 2012 (in press).
  • Maak T, Osei D, Delos D, Taylor S, Warren RF, Weiland AJ. Peripheral nerve injuries in sports-related surgery: presentation, evaluation and management. JBJS (Am) 94(16): e1211-10, 2012.
  • Rodeo SA, Delos D, Williams RJ III, Adler R PhD, MD, Pearle AD, Warren RF. The effect of platelet-rich fibrin matrix on rotator cuff healing: a prospective, randomized clinical study. AJSM 40(6): 1234-41, 2012.
  • Arnoczsky S, Rodeo SA, Delos D. What is Platelet-Rich Plasma? Op Tech Sports Med 19(3): 142-148, 2011.
  • Delos D, Murawski C, Kennedy J, Rodeo SA. Platelet-rich plasma (PRP) for foot and ankle disorders in the athletic population. Tech Foot Ankle Surg 10(1): 11-17, 2011.
  • Delos D, Rodeo SA. Enhancing meniscal repair through biology: platelet rich plasma (PRP) as an alternative strategy. Instructional Course Lectures, 60, 2011.
  • Delos D, Rodeo SA. Venous thrombosis after arthroscopic shoulder surgery – pacemaker leads as a possible cause. HSS Journal 7(3), 2011.
  • Delos D, Shindle MK, Mintz DN, Warren RF. Meniscectomy of the sternoclavicular joint: a report of two cases. JSES, e-published March 23, 2010.
  • Delos D, Warren RF, Marx RG. Multiligament knee injuries and their treatment. Op Tech Sports Med 18(4):219-26, 2010.
  • Nho S, Delos D, Yadav H, Pensak M, Romeo AA, Warren RF, MacGillivray JD. Biomechanical and biologic augmentation for the treatment of massive rotator cuff tears. AJSM 38(3):619-29, 2010.
  • Rodeo SA, Delos D, Weber AE, Ju D, Cunningham ME, Fortier LA, Maher SA. What’s New in Orthopaedic Research, JBJS 92(14):2491-501, 2010.
  • Delos D, Yang X, Ricciardi B, Myers ER, Bostrom MP, Camacho NP. The effects of RANKL inhibition on fracture healing in a mouse model of Osteogenesis Imperfecta. J Ortho Res 26(2):153-64, 2008.
  • Gardner MJ, Demetrakopoulos D, Mooar PA. The efficacy of autologous platelet gel in pain control and blood loss in total knee arthroplasty. Int Ortho 31(3):309-13, 2007.
  • Miller E, Delos D, Baldini T, Wright TM, Camacho NP. Abnormal mineral-matrix interactions are a significant contributor to fragility in oim/oim bone. Calcif Tissue Int 81(3):206-14, 2007.
  • Gardner MJ, Demetrakopoulos D, Brigss SM, Helfet DL, Lorich DG. Malreduction of the tibiofibular syndesmosis in ankle fractures. Foot Ankle Int (10):788-92, 2006.
  • Gardner MJ, Demetrakopoulos D, Brigss SM, Helfet DL, Lorich DG. The ability of the Lauge-Hansen classification to predict ligament injury and mechanism in ankle fractures. An MRI study. J Ortho Tr 20(4): 267-72, 2006.
  • Gardner MJ, Demetrakopoulos D, Shindle MK, Lane JM. Osteoporosis and skeletal fractures. HSS Journal 2(1): 62-69, 2006.
  • Gardner MJ, Griffith MH, Demetrakopoulos D, Brophy RH, Helfet DL, Lorich DG. Hybrid locked plating of osteoporotic fractures. JBJS (Am) 88(9): 1962-7, 2006.
  • Gardner MJ, van der Meulen MCH, Demetrakopoulos D, Wright TM, Myers ER, Bostrom MP. In vivo cyclic axial compression affects bone healing in the mouse tibia. J Ortho Res 24(8):1679-86, 2006.
  • Bostrom MP, Demetrakopoulos D, Reinhart J, Sculco TP. Minimally invasive posterior approach to total hip replacement. Curr Op Orthop 16:2-5, 2005.
  • Gardner MJ, Brophy RB, Demetrakopoulos D, Koob J, Hong R, Rana A, Lin JT, Lane JM. Interventions for improving osteoporosis treatment following hip fracture: a prospective, randomized trial. JBJS (Am) 87(1): 3-7, 2005.
  • Gardner MJ, Demetrakopoulos D, Shindle MK, Griffith MH, Lane JM. Prevention and treatment of osteoporotic fractures. Minerva Medica 96(5): 343-352, 2005.
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