The integrated system is not setup in that manner, but it would greatly improve things for the patients and the staff if it were. There is a Master Patient Index that VISN's can obtain information. However, they cannot see your information until you register. The registration (eligibility) staff can access the MPI using the Register Once option, but they cannot do that without your full name, ssn, and dob. The card, last name and last four won't work until they access the MPI to pull your record. The MPI will not work unless there is sufficient information to identify a record. If they have a scanner, the card may work since that information is stored on the card. You do not have to complete an application, especially if you are not staying in the area the Register Once option will retrieve your remote data. It is the primary facility that is responsible for updating your information. However, if you will be there a period of time it may be helpful to load a temporary address in case prescriptions need mailed.