When a patient is transferred or discharged, his or her medication list might omit medications, duplicate pre-existing medications, or include wrong dosages. Medication reconciliation is the process of reviewing the patient's complex medications at admission, transfer, and discharge to prevent such dangerous problems. To improve accuracy, New York Hospital Queens redesigned its medication reconciliation process. This included daily audits of medication reconciliations, which were followed by customized feedback and education for the physician's assistants conducting the reviews. After three months of process redesign, the number of medication reconciliation errors was reduced by 50%.