ONS Greenwich

ONS Physicians’ Office, Physical Therapy & MRI Center
6 Greenwich Office Park, Greenwich, CT 06831

Make an appointment online  or call 203-869-1145.

Physician Hours

Physical Therapy Hours

ONS Urgent Ortho Care

Monday- Friday
8:00 a.m. to 5:00 p.m

Monday – Thursday
6:30 a.m. to 7:30 p.m.

Monday – Friday
5:00 pm – 8:00 pm


6:30 a.m. to 5:30 p.m.

12:00 p.m. – 4:00 p.m.


7:00 a.m. to 12:00 p.m.


ONS Business and Administration Office
9 Greenwich Office Park, Building # 9, Greenwich, CT 06831

ONS Physicians in Greenwich

Paul Apostolides, MD Neurosurgery
Jonathan L. Berliner, MD Hip & Knee Replacement, Revision
Mark H. Camel, MD Neurosurgery
Matthew Cantlon, MD Hand, Wrist & Elbow
Michael R. Clain, MD Foot & Ankle
James G. Cunningham, MD Sports Medicine, Shoulder & Knee
Demetris Delos, MD Sports Medicine, Shoulder & Knee
Frank A. Ennis, MD Hip & Knee Replacement, Revision
Amory J. Fiore, MD Neurosurgery
R. Tim Greene, MD Sports Medicine, Hip & Knee
Jeffrey M. Heftler, MD Interventional Physiatry, Rehabilitation
Steven E. Hindman, MD General Orthopedics, Trauma
Brian F. Kavanagh, MD Hi & Knee Replacement, Revision
Tamar Kessel, MD Interventional Physiatry, Rehabilitation, Sports Medicine, EMG
Marc S. Kowalsky, MD Sports Medicine, Shoulder, Elbow & Knee
Alex Levchenko, DO Interventional Physiatry, Sports Medicine, EMG
Seth R. Miller, MD Shoulder Replacement, Comprehensive Shoulder
David P. Nocek, MD General Orthopedics
Sean C. Peden, MD Foot & Ankle, Trauma
Paul M. Sethi, MD Sports Medicine, Shoulder, Elbow, Knee, Shoulder Replacement
Christopher S. Sahler, MD Interventional Physiatry, Sports Medicine, EMG
Scott L. Simon, MD Neurosurgery, Scoliosis
Katherine Vadasdi, MD Sports Medicine, Shoulder, Elbow, Knee, Shoulder Replacement
Mark A. Vitale, MD Hand, Wrist & Elbow
David H. Wei, MD Hand, Wrist & Elbow
Mark Yakavonis, MD Foot & Ankle

Physical Therapists in Greenwich

Yarnya Bilinska, PTA
Nicholas Capogna, MSPT, CSCS
Christina Cauliffe, ATC
Peter Falla, ATC
Alison Feridun, MS, OTR/L, CHT
Codi Forney, DPT
Tanya Kalyuzhny, DPT, MDT
David Kell, PTA
Hannah Kimmel, DPT
Allison Macari, DPT

New Patients

For New Patients, or if you have not visited our offices in more than a year, please arrive 30 minutes prior to your scheduled appointment time to complete your registration.  To save time, the registration form and medical history form can submitted online through the Patient Portal.

Please also bring the following items 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.