Abstract: Systems, methods, and devices are described for efficient and intelligent source reductions for querying multiple sources over an external network. A medical history request for a patient is received from a requestor via a network. A set of providers is identified from a provider database based at least on the history request, and a set of physical addresses is generated based at least on the set of providers. The set of physical addresses are filtered according to filter criteria to generate a filtered set of physical addresses. Computing systems, of respective providers, which respectively correspond to the filtered set of physical addresses are queried over an external network to generate a query result that includes history information for the patient and that is representative of querying each computing system associated with the unfiltered set of physical addresses.