Method and system for patient adherence tracking

The method and system determine and report measures of adherence of patients to prescription medication regimens based upon fill gaps in the prescription history of the patients. The measure of adherence may be the proportion of days covered by the medication. The method and system may receive or access information relating to a patient's medical history, including past prescription medication fills. Fills of both the prescription medication and other medications that may substitute for the prescription medication may be considered in determining patient adherence levels. Upon determining the patient's level of adherence, the system and method may generate a report including the adherence information and associated information, such as a home pharmacy location. The report may include an indication of whether new-to-therapy information should be presented to a patient based on patient adherence levels.