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Chest pain, trouble breathing or severe bleeding?Life-threatening emergency? Call 911.
Urgent careHours listed · see hours

Ons

6 Greenwich Office Park, Greenwich, CT 06831

Call (203) 869-1145
Directions
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Nearby urgent care

All urgent care in Greenwich

Hours

  • Mon8 AMto5 PM
  • Tue8 AMto5 PM
  • Wed8 AMto5 PM
  • Thu8 AMto5 PM
  • Fri8 AMto5 PM
  • SatClosed
  • SunClosed

Hours can change on holidays; call to confirm.

Insurance

2 insurance networks list this location.

  • Aetna4 plans
  • Oxford (UnitedHealthcare)3 plans
Plan names listed (7)
Aetna
  • Aetna Health Inc. - Connecticut
  • Aetna Health Inc. - Georgia
  • Aetna Health Inc. - New Jersey
  • Aetna Health Inc. - PA
Oxford (UnitedHealthcare)
  • Freedom Network
  • Liberty Network
  • Metro Network

Call to confirm your plan. Networks change and the clinic has the final word.

About Ons

Ons is an urgent care center at 6 Greenwich Office Park, Greenwich, CT 06831. It is about 1.0 mile from the center of Greenwich, and the nearest other city we list is Riverside, 3.7 miles away. Its listed hours: open weekdays 8 AM to 5 PM, closed weekends. It is listed with 2 insurance networks, including Aetna and Oxford (UnitedHealthcare).

At a glance

Care level
Urgent care
Open 24 hours
No
Days open
5 days (weekdays)
Insurance networks listed
2
Phone
(203) 869-1145
To the center of Greenwich
1.0 mi
Hospital we list nearby
Greenwich Hospital, under 0.1 mi

If it’s an emergency

Call 911 for chest pain, trouble breathing, signs of a stroke, severe bleeding or a serious injury. Urgent care centers are not emergency rooms.

Call 911

Hospitals we list within 10 miles of Ons:

Straight-line distance. We list only some hospitals, so there may be one closer. In an emergency, call 911.

What urgent care centers usually treat

General information, not medical advice. Services vary; call Ons to ask what it offers.

  • Fever and flu
  • Cuts and stitches
  • Sprains and X-rays
  • Sore throat and strep
  • Urinary tract infections
  • Rashes and allergic reactions
  • Ear infections
  • Vaccines and physicals
  • COVID and flu tests
  • Work and DOT physicals

Before you go

General checklist.

  • A photo ID
  • Your insurance card, if you have one
  • A list of your medicines and allergies
  • A way to pay a copay or the visit
  • Call (203) 869-1145 to confirm today’s hours and that your plan is accepted
  • Most urgent care centers take walk-ins, and some also offer online check-in; ask when you call

Cost at a glance

Typical US ranges, not quotes. Ask Ons for its prices when you call.

  • Urgent care visit, billed before insurance$229–$445
  • Urgent care copay with insurance$25–$75
  • Emergency room visit, self-pay$1,200–$2,500+

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Other urgent care centers in Greenwich

See urgent care in Greenwich

Questions

Ons is located at 6 Greenwich Office Park, Greenwich, CT 06831.

Nearby cities

The information on this page is general information, not medical advice. Please verify hours, insurance and services directly with Ons before visiting. In a medical emergency, call 911.

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