Do most patients who visit ONS need surgery?
Fewer than 10% of patients treated at the ONS Center require surgery. Most conditions are resolved through a combination of medication, physical therapy, and other treatments.

Will I always see the same doctor at ONS?
As an ONS patient, you will be seen and treated by a doctor with the sub-specialty expertise best suited to treat your condition. If you require surgery, your specialist will be the one who performs your surgery and follows you through recovery and rehabilitation.

How can I have a prescription refilled?
Prescription refills should be made 2-3 days before your last dose. Log in or create an account on the ONS Patient Portal. Then click on the link to request a prescription refill.

What should I do in case I have an emergency after office hours?
If you have a medical emergency, call 911 or go to the nearest hospital emergency room. Be sure to give the name of your physician from ONS so that the hospital emergency physician can contact us about your condition.

How do I post a review or testimonial on the ONS website?
We always love to hear from our patients about their experiences at ONS. While patients cannot post directly on this website, reviews can be posted on our Facebook page and are copied into the Testimonials section of the website or emailed to our marketing department at

You can also let us know your thoughts on any of a number of rating sites such as Healthgrades and RateMD.

Why is ONS recommended for joint replacement?
ONS joint specialists perform approximately 800 total knee, hip, and shoulder replacement surgeries annually. ONS patients receive personalized care from physicians who follow their progress from diagnosis through recovery and rehabilitation. Surgeries are performed at the Greenwich Hospital Center for Joint Replacement, which is certified by the Joint Commission as one of the best programs in the country. Such recognition is earned due to their commitment to excellence, emphasis on patient communications, and involvement with personal guidance provided by a specially trained staff.

Do ONS surgeons use minimally invasive surgical techniques?
Over half of all orthopedic and spine surgeries performed by ONS physicians are done through state-of-the-art, minimally invasive or arthroscopic techniques.