How to pay only medical insurance and not social security?

You can't pay medical insurance alone. If an individual pays social security, he can only pay endowment insurance and medical insurance, which are bound together, and not just one of them.

If the enterprise pays social security, all five insurances need to be paid together, including endowment insurance, medical insurance, work injury insurance, unemployment insurance and maternity insurance.

Legal basis: Social Insurance Law Article 2 The state establishes social insurance systems such as basic old-age insurance, basic medical insurance, industrial injury insurance, unemployment insurance, maternity insurance, etc., to protect citizens' right to get material help from the state and society according to law in case of old age, illness, industrial injury, unemployment and maternity.

Article 10 of the Social Insurance Law, employees shall participate in the basic old-age insurance, and the employer and employees shall jointly pay the basic old-age insurance premium.

Individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employer and other flexible employees can participate in the basic old-age insurance, and individuals pay the basic old-age insurance premium.

The measures for the endowment insurance of civil servants and staff managed by reference to the Civil Service Law shall be formulated by the State Council.

Article 23 of the Social Insurance Law, employees shall participate in the basic medical insurance for employees, and employers and employees shall pay the basic medical insurance premiums in accordance with state regulations.

Individual industrial and commercial households without employees, part-time employees who have not participated in the basic medical insurance for employees and other flexible employees can participate in the basic medical insurance for employees, and individuals pay the basic medical insurance premium in accordance with state regulations.