Diabetes Mellitus (DM) is one of the chronic diseases related to many kinds of drug related problems (DRPs). Being a part of the healthcare team, pharmacist should be of concern for DRPs, especially those which give harm to the patients and interfere with the goal of therapy. Medication reconciliation is an effort that can be used by pharmacist to identify, avoid, and give solution to DRPs. This research aims to identify potential and actual DRPs in diabetic patients through medication reconciliation process. This research used a non-experimental design where the researcher intends to give a description on DRPs identified through medication reconciliation process. Sample in the study were type 2 DM patients who gave a visit to a Primary healthcare centre in Bantul, Yogyakarta during August – December 2015. Medication reconciliation process was conducted by gaining complete information of drugs/herbs/supplements that were routinely consumed by the patients and comparing it with newly prescribed drugs at the time of visit. Actual and potential DRPs were identified based on the result of comparison and evaluation of patients’ drugs/herbs/supplements consumption. A number of 35 type 2 DM patients were included in this research. Result showed that 82.86 % of patients were identified with actual and/or potential DRPs. Actual DRPs identified were incompliance (39.39%) and adverse drug reaction (9.09%), while potential DRPs identified were adverse drug reaction (15.15%) and drug interactions (36.36%). Medication reconciliation resulted in more complete information useful to identify DRPs.