Medical insurance cannot be used across cities. According to "can medical insurance cards be used across cities?" Through the query map network release, it shows that the medical insurance card cannot be used across cities. Medical insurance is managed according to the principle of territoriality, and the funds on the medical insurance card are distributed by counties and cities according to the payment of the insured. The insured person who uses the medical insurance card to see the clinic or buy medicine shall be settled by the county, city and bank. Therefore, the medical insurance card cannot be used across the city. The medical insurance card can only be used in designated clinics and pharmacies, and cannot be mixed with designated clinics and pharmacies directly under the city. Medical insurance refers to basic medical insurance, which is a social insurance system established to compensate workers for economic losses caused by disease risks. The medical insurance fund is established through the contributions of employers and individuals. After the insured person has medical expenses, the medical insurance institution will give certain economic compensation.