Providing access to health records by electronic means, namely, facilitating HIPAA-compliant sharing and maintenance of patient medical information among authorized health care providers, such that this information can be quickly and securely reviewed, exchanged and used by the providers to diagnose and treat a patient, as a means of increasing medical information efficiency, confidentiality and accuracy; providing access to health records by electronic means, namely, providing individual and aggregate medical profiles and medical record analysis service designed to provide patients and health care providers with custom tailored information about the range of possible diagnoses and therapies associated with a defined set of symptoms; electronic health records management services, namely, developing and maintaining a provider directory and a master patient index for use in a health information exchange; developing and maintaining a health information exchange