ONS Stamford

COVID-19 Update

ONS has temporarily suspended all nonessential physician visits. 

Patients with acute injuries who are truly in need of immediate orthopedic care must call for an ONS Urgent Care appointment.  At this time, ONS Urgent Ortho Care  is only available at the Greenwich office, Monday through Saturday from 12:00 pm to 4:00 pm.

If you would like to consult with an ONS physician and your condition is not the result of a sudden, acute injury, call our office – 203-869-1145 – to set up an ONS Telehealth appointment and one of our experienced representatives will help you get started. 

Physical Therapy appointments for essential therapeutic treatment are available at this location, Monday through Friday from 12:00 pm – 4:00 pm.  Call 203-869-1145 for an appointment and select option 3.

ONS Physician offices and Physical Therapy Center*
5 High Ridge Park, 3rd floor, Stamford, CT 06905

Patient parking is located behind the building.  Handicap parking is located on the lower level.  Follow the sign for Patient Drop Off.

Physical Therapy Hours*
Monday – Thursday, 12:00 pm- 4:00 pm

*NOTE: The last PT appointment in the day is scheduled 1 hour prior to closing.

Stamford MRI Center
No appointments available.

ONS in Stamford

ONS Physicians in Stamford

Matthew Cantlon, MD 

Hand Wrist & Elbow

James Cunningham, MD

Sports Medicine, Shoulder & Knee

Demetris Delos, MD

Sports Medicine, Shoulder & Knee

Tim Greene, MD

Sports Medicine, Hip & Knee

Steven E. Hindman, MD

General Orthopedics, Trauma

Marc Kowalsky, MD

Sports Medicine, Shoulder, Elbow & Knee

David P. Nocek

General Orthopedics, Trauma

Sean Peden, MD

Foot & Ankle

Christopher Sahler, MD

Interventional Physiatry, Sports Medicine, EMG

Scott Simon, MD


Katie Vadasdi, MD

Sports Medicine, Shoulder, Elbow & Knee

Mark Vitale, MD

Hand, Wrist & Elbow

Stamford Physical Therapists

New Patients

New Patients or patients who have not visited ONS in more than a year, please arrive 15 minutes prior to your scheduled appointment time to complete your registration, or save time by completing the forms online through the Patient Portal.  Also, please also bring the following to your appointment:

  • Insurance card

  • List of current medications and medical conditions

  • Primary-care physician address and phone, and contact information for other physicians involved with your care

  • Recent diagnostic images such as CTs, MRIs, x-rays, bone scans, or EMGs. Bring both original films and copies of reports