Unplanned Regionalization and Interstate Dependence in Pediatric Hospital Care

In this cross-sectional study, pediatric care in New England constituted a de facto regionalized system, with substantial interstate movement of patients and heavy reliance on Massachusetts. These findings highlight an unplanned interdependence that may leave the system vulnerable to disruption. Regional planning and formal coordination among states may be necessary to ensure sustainable access to care. These findings may hold relevance for other regions.