Mercy Laboratory Services - Clayton-Clarkson 15945 Clayton RoadBallwin, MO, 63011Mercy Clayton and Clarkson View Phone 636-256-5315 Fax: 636-256-5319 15945 Clayton RoadBallwin, MO 63011Mercy Clayton and Clarkson View Website Experience & Reliability About Connect with this Business: Send to My Email Send to My Phone Print this Page