Objective: The price of medical services is related to the vital interests of the people. It aims to explore the policy dif- fusion characteristics of medical service prices in China, and promote the reform of medical service prices. Methods: Based on the theory of policy diffusion, it conducts text measurement and content analysis on 440 central and provincial policies in China from 2000 to 2022. The diffusion of medical service price policies is analyzed from three dimensions: time, space, and content. Keyword temporal analysis was used to deeply explain the diffusion mode and mechanism of medical service price policies. Results: In terms of time dimension, the diffusion of medical service pricing policies in China generally follows a “ladder shaped” trajectory of “slow-fast-slow-fast alternation”in speed; in terms of spatial dimension, there are differences in the enthusiasm of policy adoption among provincial governments in China, and policy diffusion has a proximity effect; in terms of content dimension, China’s medical service pricing policy focuses on three aspects: institutional norms, specific regulations, and external environment. Conclusion: The price of medical services in China has the characteristics of a top-down hierarchical diffusion model in policy diffusion, as well as a parallel diffusion model between departments and regions at the same level.