Pace and Leatherwood Mds PC 12070 Old Line Center Suite 302 Maryland (MD) Waldorf, 20602 (301) 645-6667. Accepting New Patients. Yes * Please verify this information when scheduling an appointment. Map & Directions. Pace and Leatherwood Mds PC, 12070 Old Line Center Suite 302, Waldorf, Maryland (MD), 20602 ... Medical information portal to ....