- 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 Service, Hospital for Special Surgery, New York, NY
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.
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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
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.
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.
Conditions & Treatments Include:
Overall – very pleased. Great bedside manner and professional. Great surgeon and follow up post-surgery. Always available when needed as well as attention to detail. Listens to concerns and needs. Have recommended to friends and would go back. The staff at ONS was amazing also. (5 Star Review on Healthgrades from Sara A.)
In a little less than two years ago, I had a small accident and broke my right shoulder. I had been seeing another physician for almost five months and my shoulder still wasn’t healing. The physician had tried of number of different things but nothing seemed to help. Needless to say my frustration level was over the top. Being right handed, many things in my life were quite difficult especially since my job requires me to type a lot on a computer. I had just seen the physician for an appointment and he wanted to wait a few more weeks to see if what we had been trying for months might finally work to get my bone to heal. A member of my family convinced me to see a doctor in the ONS practice because they had helped him a few years earlier. I made an appointment for Friday, July 29 with Dr. Delos. I met with him and conveyed my overwhelming frustration and I needed something done quickly. After reviewing my case and seeing the other things that had been tried, he realized surgery was the only option left. I agreed but told him it needed to be done as soon as possible because in six weeks I was going away and needed to be well on the way to being healed by then. Well, he and the staff took my request very seriously and started jumping through hoops to get me in for surgery. The staff was very helpful in getting everything together. Everything about the surgery was explained so I understood the procedure and recovery very well. Well, five days later on Wednesday, August 3, I was in Greenwich Hospital getting my surgery. The surgery was a total success. All my follow ups went well and the staff took great care of me. I would easily recommend ONS for any orthopaedic needs, big and small. Thank you. I can’t explain how good it was to get back the use of my arm. (F.V.O, 5 star review on the ONS Facebook page)
I had a bilateral knee replacement in May of this year and I could not be more pleased. While there was some concern about doing both knees at the same time, the procedure went extremely well and the recovery has been all I could have hoped for. I would highly recommend Dr. Delos for this procedure. If possible, he exceeded my expectations. (5 star review on Healthgrades from a patient in Stamford, CT)
Dr. Delos is a wonderfully gifted orthopedic surgeon who is also incredibly compassionate and personable. He instills a well-deserved sense of confidence in his patients, and even has a sense of humor! Dr. Delos surgically repaired my fractured collarbone by affixing a metal plate. The fractured bone and surgical wound healed completely without complication and post-surgery pain was well-controlled and never an issue. I highly recommend Dr. Delos and the highly efficient staff at ONS. (Five star review on Healthgrades from a patient in Port Chester, NY)
Dr. Delos recently performed arthroscopic knee surgery for a torn meniscus. I was pleased by his conservative approach to addressing my injury with a plan I was comfortable with. I started with Physical Therapy first, and then ultimately surgery. He thoroughly explained what the surgery would entail, the recovery process and set a realistic expectation of when I could return back to exercising. (Five star review on Healthgrades from Margaret in CT)
Dr. Delos is an awesome surgeon. He performed a knee replacement for my husband. Could not have had a better surgeon. Dr. Delos also helped our daughter who was injured in Canada with a fractured hip. His approach to her was so positive, and he was extremely honest with her prognosis as long as she followed his direction. She is now doing full marathons and an Ironman. All of this was because of Dr. Delos. He is the best surgeon I have ever met. His people skills are beyond reproach as well as his office staff. (Comment from Rate MDs)
I broke my shoulder and arm and Dr. Delos was brought in to operate on me. He’s got a wonderful manner about him and he’s an excellent doctor who follows up with his patients. (comment from Health Grades)
Dr. Delos is a very competent and caring surgeon, who is respectful of his patients as well as their time. He is knowledgeable and capable as well as kind. He operated on my broken ankle and I had an excellent results. (comment from Health Grades)
If it wasn’t for Dr. Delos I would not be walking without pain. I am almost 7 months out from TKR and I feel great!!! I am back to my normal routine. Dr. Delos’s bed side manner is fabulous. He is caring and listens to what you have to say. I recommend him all the time when people ask who did my surgery. (comment from Health Grades)
I broke my knee cap in 7 pieces. Dr. Delos repaired my knee with such expertise that I have healed quicker than expected. His professionalism is excellent and I would recommend him to my family and friends. (comment from RateMD)
Dr. Delos is not only an exceptional doctor, but he is caring and compassionate. My daughter had a torn ACL and Meniscus and was scheduled to compete in Disney. Dr. Delos worked with her to assure she could take the mat and compete prior to her surgery. He was factual but understanding of the opportunity she had in going to Disney. I would recommend him to EVERYONE in need of his specialty. I would recommend him to EVERYONE in need of his specialty. (comment from RateMD)
Young, innovative, and on the cutting edge of his specialty. Dr. Delos replaced both my knees and I had wonderful results with minor pain, minimized by his phenomenal anesthesia formula. Best of all, the lack of external stitching (using medical glue instead) eased the healing process and left no ugly scarring. I could not ask for better results. Highly recommended by HSS and deservedly so. Thanks Dr. Delos. (comment from RateMD)
Dr. Delos and the entire staff at ONS are and always have been so friendly and professional. I cannot say enough positive things about him and will gladly recommend him and ONS to any and every one! Thank you all so much! (DP)
Dr. Delos has been an excellent physician throughout. I always felt like we were in this together. (Patient Survey)
I’ve had my share of experiences with orthopedic surgeons. But I must say Dr. Delos is by far one of the best if not the best doctor I’ve ever been to. He strives to do the best for you and your recovery. Thank you for all of your help Doc because of you I can go back to my normal life. God bless you this and every day. (RM)
For 21 year old S.R. the first game of the Division III soccer season at SUNY Purchase was her last. She twisted her knee awkwardly while running down the field and tore the anterior cruciate ligament (ACL) in her knee. She knew the ordeal she was in for, having torn the ACL in her other knee four years earlier while playing high school soccer. “I knew there would be surgery and six months of rehabilitation, but it was my senior year and I was determined to be back in shape to play lacrosse in the spring,” she said.
With the help and guidance of sports medicine specialists, Dr. Demetris Delos, S.R. achieved her goal. Not only did S.R. contribute to her team’s 9 and 3 season, she was named MVP of the team, and Female Athlete of the Year by the university. She also qualified for the First Team All Conference and All Regional in lacrosse.
“Dr. Delos was so nice and friendly and straightforward in terms of expectations and recovery time. He turned a bad situation into a great experience.” (SR)
12 year old soccer player, Sam M., was on top of his sport when he developed knee pain and swelling after a fall during a game last June. He kept it to himself because he didn’t want to jeopardize his chance to compete internationally at the Madrid Cup in September. Although he did make it to the tournament, he spent most of his time on the sidelines with his knee too painful, swollen, and difficult to move.
Upon returning home, Sam’s mother, Paula, brought him to see Dr. Demetris Delos, a sports medicine physician who specializes in knee injuries. Dr. Delos ordered an MRI, which revealed a slight fracture in Sam’s knee and a one inch piece of loose cartilage that would require surgery to repair. The injury was close to the growth plate, which could have had long term consequences. However, the surgery went well and Sam is back on the soccer field with his sights on the Hackley School’s Academy Team.
“Dr. Delos was always positive and everything he said would happen transpired, “said Paula M., Sam’s mother. “I was very impressed with the high level of care and collaboration with the physical therapists because they all wanted Sam to achieve his goal. Everyone was unbelievably caring.” (SM)
When my arthritis got so bad that I couldn’t walk, I knew I needed to have my right knee replaced. I went to ONS because my daughter had been treated by Dr. Camel and Dr. Sahler, and I was very impressed by how supportive and caring they were. As soon as I met Dr. Delos, I had every confidence that I was in good hands. He has a great bedside manner, he’s honest and straightforward. He took the time to answer every question my husband and I had about the procedure. Two months after my surgery, I was able to take a trip to Cancun and walk around the Mayan ruins and the only thing that bothered me was the heat. I’m going to Disney World next month, and I can’t thank Dr. Delos for making it all possible. I recommend ONS to everyone. (SS)
In July of 2014, Dr. Delos performed ACL surgery on my daughter. Brooke is doing great! In fact, since surgery Brooke has returned to playing volleyball & basketball. She played Varsity Volleyball from Stamford HS where she was a setter. She also played Varsity Basketball where she was the starting point guard. Both teams had a great year, but the girls basketball team had a historical year. The Stamford Knights won the FCIAC Title (District title) and the CIAC Title (State Championship.) Thanks to Dr. Delos, Brooke was a huge part of the team’s success. (CK)
I came home from my vacation in the Dominican Republic with two broken shoulders. Dr. Delos was absolutely amazing. He has a kind and caring bedside manner and when he told me I needed surgery on my left shoulder, I never had a thought to go anywhere else. I highly recommend him. (JR)
In 2014, local student athlete Brooke was playing basketball with her team in the 7th of 8 games at the AAU Nationals when she became injured during a layup after another player collided with her causing immediate knee pain. “I fell down and the trainer helped me off the court. We could see instant swelling and knew I needed to see a doctor” said Brooke.
Brooke suffered a painful injury which required surgery. ONS orthopedic surgeon Demetris Delos, MD performed surgery to repair a torn ACL and a partial meniscus tear. Brooke said, “I felt a little bit timid before the surgery but the surgery went well.” (more…)
Dr. Delos operated on my broken ankle 6 months ago and today I have graduated and am doing great! My experience was very good at ONS and I have a healthcare background so I am very picky when I choose a doctor. The ONS office is extremely well-run and the ambulatory care center is top notch. I’m not sure how they could do a better job and they called me the next day to see how I was doing after surgery. I’ve referred friends to ONS in the past months that have seen other specialists at ONS who have told me they have all had the same experience. I’ve even brought my daughter here for care. Dr. Delos is very knowledgeable, competent, and caring. (MS)
Dr. Delos: I had a full tissue tear of my rotator cuff. Dr. Delos examined me and pointed out the alternatives and how we could approach the injury. He explained his plan and operated to repair the damage at the ambulatory center. The experience was very good and they called me the next day to see how I was doing.
I needed physical therapy 3 days a week for the first few weeks, then twice a week and now I so much better six months later. (more…)
ONS is excellent! The staff is warm and very nice to children. I injured myself at work and came to see Dr. Delos. He explained that I needed surgery and it was scheduled at the Holly Hill Ambulatory Center. ONS and surgery center staff are lovely people. Dr. Delos was very human and made sure to explain all that I needed to have done to get back to normal. It was a perfect experience and I am pain free. (IK)
Dr. Delos, – “I was new customer at ONS. The staff showed me that they are really professional and made me feel comfortable, that they were reliable and it felt like home. Thanks everybody!” (Anonymous)
Everyone at ONS was very warm and friendly. Dr. Delos was extremely helpful and very direct with his thoughts and recommendations, which I liked! (Anonymous)
Dr. Delos was incredibly helpful and knowledgeable. He diagnosed my son’s Lyme disease almost immediately and this was confirmed by testing. (Anonymous)