Mercy Laboratory Services - O'Fallon 300 Winding Woods DriveO Fallon, MO, 63366Mercy Winding Woods View Phone 636-379-4301 Fax: 636-379-4302 300 Winding Woods DriveO Fallon, MO 63366Mercy Winding Woods View Website Experience & Reliability About Send to My Email Send to My Phone Print this Page