Dr. William J. Vornberger Family Doctor. Contact Info Phone: 519-336-339 Location 481 London Road Unit: Suite 7 Sarnia, ON N7T 4X3 View Map Mailing Address: 481 London Road, Unit: Suite 7, ON, Year Established: 2009 F/T Employees: 3 Key Contact: William Vornberger NAICS Code: 62111 - Offices of physicians Site Selector Map: View location