11. A diabetes management application residing on a portable computing device, comprising: a structured test module operable to administer a given structured collection procedure to the user of the portable computing device, where the given structured collection procedure specifies one or more collection events for obtaining blood glucose measures for a patient; a logbook configured to store data entries related to diabetes care of the patient, the logbook implemented in a data store on the portable computing device; an input module configured to present a given data entry to the user on a display of the portable computing device and receive modifications to values of the given data entry from the user, where the given data entry is retrieved from the logbook and includes a blood glucose measure and a time at which the blood glucose measure was taken, a membership rule set that defines rules for associating data entries received from the user with structured collection procedures including adherence of date and time and adherence to a previous data entry, where the membership rule set is stored in a data store on the portable computing device; and a membership module configured to receive the modified given data entry from the input module and evaluate the modified given data entry in relation to the given structured collection procedure using the membership rule set, where the input module, the structured test module and the membership module are executed by a computer processor residing on the portable computing device.
13. The diabetes management module of claim 11 wherein the membership module further operates to input the modified data entry into the logbook, wherein the data entry is not associated with the given structured collection procedure.