We assessed destination information from the EDN system for immigrants and refugees arriving during 2009 and 2010 with TB disease (Class A TB with waiver) or a radiographic TB without positive smear or culture for TB (Class B1), or LTBI (Class B2), or contact with a TB case. The destination information was mapped with ArcGIS software to the county level and aggregated at the national level. Data were categorized by region according to the 10 Agency for Toxic Substances and Disease Registry (ATSDR) regions (5) . Since the change of location after arrival can be entered into the EDN system by the health department, this information was assessed for the system's ability to provide secondary migration information.