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 with this link> New Patient Registration and Medical History form.  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.

500 Mamaroneck Avenue, Ground Floor, south entrance, Harrison, NY 10528
Open: Monday- Friday | 8:00 a.m. to 5:00 p.m.

DIRECTIONS SOUTHBOUND

FROM I-95 South

  • Take I-95 SOUTH
  • In New York, take Exit 18 B for Mamaroneck Avenue West toward White Plains
  • In approximately 1.2 miles, ONS at 500 Mamaroneck Avenue will be on the right
  • Enter through the South Entrance

FROM MERRITT/HUTCHINSON RIVER PARKWAY SOUTH

  • Take Exit 23 South to Mamaroneck Avenue toward Mamaroneck
  • Go approximately 0.5 miles and make a U-Turn on Mamaroneck Avenue
  • ONS at 500 Mamaroneck Avenue is on the right
  • Enter through the South Entrance

NORTHBOUND

FROM I-95

  • Take  I-95 NORTH
  • Take Exit 18B for Mamaroneck Avenue West toward White Plains
  • In approximately 1.2 miles, ONS at 500 Mamaroneck Avenue will be on the right
  • Enter through the South Entrance

FROM HUTCHINSON RIVER PARKWAY NORTH

  • Take Exit 23 South to Mamaroneck Avenue toward Mamaroneck
  • At the third traffic light, turn left into the 2nd entrance to 500 Mamaroneck Avenue, South. (Important: Google maps directs you to the 2nd light and North Entrance. Do not enter the North entrance.)
  • ONS is on the left. Parking is in front of the entrance.