Mercy Urgent Care - O'Fallon

300 Winding Woods Drive
Suite 100
O Fallon, MO 63366
Fax: (636) 379-4328
Services are provided by Mercy Hospital St. Louis Learn more »
Hours of Operation:
Open daily: 8 a.m. - 8 p.m.
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Accidents and illnesses can happen anytime – even when your regular doctor may not be available. With Mercy Urgent Care in O'Fallon, MO, you can walk in without an appointment and get the medical attention you need at a lower cost and with a shorter waiting time than in your local emergency room.

Use urgent care for: 

Remember: Urgent care is not a substitute for the ER. If your symptoms are life-threatening, call 911 immediately.

Where to Go When - ER vs Urgent Care vs Convenient Care

Download our guide to help you choose the right location.

What does an urgent care treat?