1. A system for analyzing de-personalized health care data, comprising: (a) a plurality of health care databases, the plurality of health care databases each including at least one record, each record including a depersonalized yet unique patient identifier associated with a patient, whereby the de-personalized patient identifier is common for a specific patient across the plurality of health care databases; (b) a processor coupled to the plurality of health care databases, wherein the processor performs the steps of: (i) receiving records from the plurality of health care databases; (ii) querying the records received from the plurality of health care databases, based upon selected person-level criteria; and (iii) generating at least one report based upon the results of the querying step.