This pilot project aims to use EMS transport vectors and hospital specialty data to descriptively map the defacto "regionalization" of specialty care in Minnesota, similar to our regionalized trauma system. Regionalization is the tiered organization of a system for the delivery of health care within a region to avoid costly duplication of services and to ensure the availability of essential services. We have begun by looking at those services other than trauma care that have been proposed for "regionalization" in the specialty literature or by the federal government. These include STEMI care, cath labs, neurologic care, neurosurgical care, pediatric care, PICU/NICU care, and adult critical care. We have mapped the static but historical component of the provision of specialty care in relation to population density using publicly-available, non-patient data from the US Census, the Minnesota Hospital Association, and the American Hospital Association. We have also applied for access to MNSTAR state EMS transfer data in order to map inter-relations between nodes in our de-facto regionalized system. To our knowledge no prior research has developed such a comprehensive map to inform policy and healthcare development either at a government level or between systems. Our aim is to provide a starting point for future policy and inter-system discussions about planned "regionalization," which will likely grow louder with the rise of accountable care organizations, health system consolidation, and other aspects of health reform associated with the Affordable Care Act.