Medical data are of great importance to people's life, social production and development, and national construction, and they have attracted much attention around the world. In nowadays with continuous development of science and medical technologies, the application scenarios and scale of medical and health data keep expanding in a relatively fast manner; however, there are still many problems requiring to be solved. In this paper, through analyzing the integration and application of data in the medical information system, the problems about the integration of medical data under the background of hospital informatization are explored, and the specific solutions with respect to the integration and application of medical data are proposed, so as to provide a reference for the related researchers. 

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