Introduction: Knowledge Management Maturity [KMM] determines the capacity and stages of the organization’, s growth in processes and the readiness and identifies the necessary element for the successful implementation of Knowledge Management strategies, goals and plans. This study was conducted With the aim of designing a model for assessing KMM in healthcare organizations. Methods: This was an applied research that has been done by mixed method. At the qualitative phase, snowball sampling was used. Semi structured interview was done With 12 experts in healthcare organizations in Tehran. The interviews were analyzed by qualitative content analysis. Two methods were used for reliability, reviewing articles after implementation by expert peoples and agreement of two coders. According to extracted factors, close questionnaire was prepared and distributed to 120 expert peoples by purposive sampling method and requested them to prioritize the choices according to Likert scale. For data analysis, SPSS 22 and exploratory factor analysis was used. Results: In extracted model, five main layers were identified, including strategy, processes, enablers, outcomes and external factors. The KMM levels include of initial, awareness defined, managed, optimized, entrepreneur and professional. The maximum load factor was related to the managed level [0. 964]. Each level of Maturity was correlated With next level, indicating continuity of KMM levels [p<0. 05]. Conclusion: The results showed that in KMM and learning organizations, the social dimension in healthcare service was more important than technical aspect as relates to the health of community and peoples. The role of Knowledge culture and leadership in KMM and learning organization were more prominent than other factors.