In this study, the investigators will evaluate the impact of a Medication Adherence Program (MAP), a systematic telephone call to patients who are overdue for refills, to assess individual reasons or barriers to refilling prescribed DM medicines, discuss diabetes care progress, and provide intervention to resolve any barriers to taking prescribed medicines. The hypothesis for the study is that personalized telephone follow-up by a pharmacist will assist people who have missed refilling their prescriptions in taking diabetes medicines by resolving medication adherence challenges. Following randomization, the intervention will be offered to patients of four Seattle-area Safeway Pharmacies, Inc, who are overdue for prescribed DM medicine refills by at least 6 days. Control subjects will receive usual pharmacy care at the participating Safeway pharmacies as a comparison. The study will provide medication adherence support to intervention subjects for 12 months following enrollment with the goal of improving medication refilling and persistence.