All Mercy services have reopened! See how we’re keeping you safe and use our interactive COVID-19 screening tool.
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.
At Mercy, we offer comprehensive services to diagnose and treat a full range of conditions, including:
At Mercy, we offer comprehensive testing services to diagnose conditions and injuries, including:
Mercy Urgent Care is now part of the Veterans Affairs (VA) Community Care Network. Veterans can get quality urgent care without prior approval from the VA. Learn more.