AbstractBackground and AimsImplementing diagnosisârelated groups (DRGs) in different countries increases the efficiency of healthcare services, improves treatment quality, and reduces treatment costs. Due to the lack of a coherent model for its implementation, the present study aimed to develop a DRGsâbased implementation action plan Model for Iran.MethodsThe present study was an applied, descriptive crossâsectional study conducted in three stages. In the first stage, a review of studies conducted in different countries was carried out. In the second stage, a model was designed for an action plan to implement the DRGs in Iran. In the third stage, the model was validated based on the Delphi technique.ResultsThe DRGsâbased implementation action plan model in Iran was designed in three primary axes, including the strategic approach of the DRGsâbased implementation action plan, technical dimensions, and executive institutions involved in the DRGsâbased implementation action plan. Validation of the designed model showed the agreement of experts (94%) for the mentioned axes.ConclusionThe significance of tailoring a DRGsâbased implementation action plan to each country's unique context is wellâestablished. Given the intricacies of the Iranian healthcare system, we recommend an initial pilot implementation of DRGs at the hospital level, followed by a gradual national rollout.