American Board of Orthopaedic Surgery & Fellowship Trained Orthopaedic Surgeon

19

Years of Experience

Demetris Delos, MD Board-Certified, Fellowship Trained Orthopaedic Surgeon

Demetris Delos, MD is a fellowship trained, board-certified orthopaedic 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.

Our Specialties

Awards & Honors

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
AOSSM
Young Investigator
Grant recipient, 2010
Hellenic Medical
Society Scholarship, 2002

Success Stories

I'd grown depressed with the speed of my shoulder recovery. Dr. Delos explained the injury and told me to keep doing PT and remain patient. We agreed a steroid shot would be appropriate to speed thing...

~ CS ~
I was quickly taken to a room and then to get X-rays. Everyone was professional and kind. Dr Delos showed me the X-rays and then told me to exercise and take anti-inflammatory medicine. Unfortunately ...

~ JG ~
Dr. Delos and his team at ONS are outstanding, professional, knowledgeable, and true experts in their field. He’s performed two surgeries for me, both with excellent outcomes. I’ve already...

~ PF ~
Dr. Delos was the consummate professional! He was thorough, patient, knowledgeable and kind. I highly recommend Dr. Delos to anyone needing the services he offers.

~ MK ~
Dr. Delos fit me into his busy schedule at the last minute. He drained my knee, injected a steroid and gave me exercises to do to keep moving. Professional, smart, caring, and fast. Highly recommend!!

~ LP ~

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Conditions & Procedures

Non Surgical Treatment

Regenerative Medicine/Biologic Therapy

Regenerative medicine in orthopedics uses biologic therapies derived from the patient's own cells and tissues to enhance healing and repair of musculoskeletal injuries and degenerative conditions.

Getting You Back in the Game

Sports Medicine Expert

Sports Medicine, also known as sports and exercise medicine (SEM), is a branch of medicine that deals with the treatment and prevention of sports and exercise-related injuries and improving fitness and performance.

How ONS Got High School Teammates Back on the Field After ACL Tears
Posted on: 11-Nov-2025
For Jillian and Michaela, varsity soccer teammates at Trumbull High School, a successful senior season in 2025 was never guaranteed. Both had suffered serious knee injuries during their sophomore year...
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Avid Tennis Player Back in the Game through ONS
Posted on: 11-Nov-2025
“I had several great experiences with ONS and, in particular, with Dr. Delos. I’m an avid tennis player, but I was sidelined due to a nagging knee injury and a rotator cuff issue.
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Back on the Slopes: A Patient’s Return to Outdoor Activities After a Meniscus Tear
Posted on: 11-Nov-2025
Kevin is an outdoor enthusiast who enjoys kayaking, hiking and skiing. He estimates he’s doing one of the three activities every other day. Last year, he slipped and fell on a wet rock while getting...
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