Mercy Laboratory Services - Mercy Heart Hospital St. Louis 625 S. New Ballas RoadSt. Louis, MO, 63141Mercy Heart and Vascular Hospital St. Louis View Phone 314-251-1023 Fax: 314-251-4971 625 S. New Ballas RoadSt. Louis, MO 63141Mercy Heart and Vascular Hospital St. Louis View Website Experience & Reliability About Send to My Email Send to My Phone Print this Page