Mercy Laboratory Services - O'Fallon

Imaging, Labs or Tests
300 Winding Woods Drive
O Fallon, MO 63366

Phone: (636) 379-4301
Fax: (636) 379-4302
Monday-Friday: 7 a.m. - 5 p.m.
Services are provided by Mercy Hospital St. Louis Learn more »

We offer a full range of lab testing services. Test results are immediately transmitted to your physician’s office. Patients may also have specimens collected and tested here and the results sent to a specialist in another city. In addition to routine lab tests most often requested by your physician, we provide health screens to promote wellness and reduce health risks in our community.