Medication reconciliation (MR) occurs during transitions of care and is the process of reviewing a patient’s medication list and comparing it with the regimen being considered for the new setting of care. This study developed and tested standardized assessment data elements (SADE) for reconciliation of high-risk medications in post-acute care settings. The final set included seven elements; results demonstrate feasibility and moderate to strong reliability. The resulting seven data elements may provide the means for post-acute care settings to assess and improve this important quality process.