Legal analysis: the supervisor of the employees' medical mutual aid is a division under the provincial trade union, which is independent of the medical insurance center, and can be understood as the auxiliary policy of medical insurance, but in view of the uniformity of the processing, it is generally handled by the medical insurance center on behalf.
Legal basis: "Chinese People's **** and State Social Insurance Law" Article 7 The State Council administrative department of social insurance is responsible for the management of social insurance throughout the country, and other relevant departments of the State Council are responsible for the relevant social insurance work within their respective areas of responsibility. The social insurance administrative departments of the local people's governments at or above the county level are responsible for the administration of social insurance in their respective administrative areas, and other relevant departments of the local people's governments at or above the county level are responsible for the relevant social insurance work within their respective areas of responsibility.