Medical insurance can't be used The reason why the student medical insurance card balance is 0: the medical insurance expenses have been fully reimbursed; The balance of medical insurance account is insufficient; The medical insurance fee was not paid in time, and the medical insurance paid by the school could not be found. The main reasons are: I participated in medical insurance, but I didn't register according to the process, or the data transmission of medical insurance was unsuccessful. Activation method of medical insurance card: Designated hospital activation: When you go to a designated hospital to see a doctor, you can register with a social security card, so that the social security card will activate the function of medical insurance card and settle accounts directly according to medical insurance, thus saving a sum of medical expenses. Activation of designated pharmacies: you can buy medicines at designated medical insurance pharmacies or use social security cards, so that you can activate the functions of medical insurance cards and check the account balance.