Schedule an Appointment

Patients who are new to ONS or who have not visited our offices in more than a year, should complete a medical history and patient registration form online via the ONS Patient Portal.

ONS Greenwich CT physicians officeIf you do not pre- register via the portal, please download and complete the two forms below and arrive 20 minutes before your scheduled appointment to complete paperwork. This will help to expedite check-in.

Send a request for an appointment
with one of our physicians

Greenwich and Stamford Office Hours:
Monday through Friday
8:30 a.m. to 5:00 p.m.

To make an appointment, call (203) 869-1145 during office hours, or request an appointment online.  Please have your insurance card ready when you call.

If you are unable to keep a scheduled appointment, please notify our office as soon as possible.

If you would like to sign up for text reminders about your upcoming appointments please download the Text Reminders document and follow the instructions.

Please note: Payment is due at time of service for private pay patients.

Please also bring:

  • Current insurance card
  • List of current medications and medical conditions
  • Primary-care physician address and phone number 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.

Forms to download, fill out and bring to your appointment:

Patient Registration Form
Health History Form

ONS at Tully Health Center in Stamford:

To make an appointment with neurosurgeon Scott L. Simon, MD (Tuesdays), call (203) 487-0363, Monday through Friday between 8:30 am and 5:00 pm.

OXFORD AND AETNA PATIENTS – Does your insurance plan require an in-network referral?

Please check the back of your insurance card and see if there is a box that says In-network Referral Required.  If so, you will need to get an insurance referral from an in-network primary care physician, pediatrician or OBGYN.

Please note, if we verify your insurance and find that you need a referral, you will not be able to be seen by the doctor until you get one from an in-network physician.


ONS physicians are “unassigned with Medicare”. This means you will be asked to pay for your visit at checkout. We will submit the claim to Medicare for you, then Medicare will send payment for your visit directly to YOU. The fees we charge are based on the Medicare published fee schedule.

Patient Portal

Patients who are new to ONS or have not visited our offices in more than a year should register on our Patient Portal to complete all the necessary forms online. To join the patient portal, click here and follow the instructions.

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