1. A computerized medical diagnostic system, the system comprising: a diagnostic module to interact with a patient or a healthcare professional, obtain associated patient health items representative of the health of the patient via input, and provide an initial differential diagnosis; a panel module in data communication with the diagnostic module, the panel module comprising a plurality of diagnostic strategy processes, each of which generates a corresponding strategy differential diagnosis based on the patient health items, wherein the panel module compares at least a portion of the strategy differential diagnoses to thereby generate a panel differential diagnosis; a computing environment operative to execute the modules, the computing environment comprising at least one processor; and wherein the initial differential diagnosis and the panel differential diagnosis are reconciled so as to recommend an action or provide a diagnosis via output to the patient or the healthcare professional wherein the diagnostic module comprises a plurality of disease objects, each disease object having a list of one or more patient health items.