Legal analysis: According to Article 17, Article 19 to Article 21 of the Regulations on the Supervision and Administration of the Use of Medical Insurance Funds, the medical insurance card is invalid under the following circumstances: 1 Using someone else's social security card to see a doctor in the hospital, and using someone else's social security card to pay the medical expenses that should have been paid by yourself. 2. Lend your social security card to others. 3. Use social security cards to prescribe drugs in hospitals that exceed the amount needed for illness, hoard drugs or resell the drugs issued. 4. Use the social security card to purchase non-pharmaceutical items such as health care products and daily necessities. 5. Forge medical records, prescriptions, inspection reports, disease diagnosis certificates, etc. And use this as a reimbursement voucher for medical insurance accounts, conduct medical insurance fraud, and collect social security funds. It should be noted that according to Article 280 of the Criminal Law of People's Republic of China (PRC), anyone who forges, alters or embezzles another person's social security card, if the circumstances are serious, shall bear criminal responsibility.

Legal basis: Regulations on the Supervision and Administration of the Use of Medical Insurance Funds

Seventeenth insured medical treatment and drug purchase should hold my medical insurance certificate, and take the initiative to produce for inspection. Insured persons have the right to require designated medical institutions to truthfully issue expense documents and related materials. Insured personnel should properly keep medical insurance certificates to prevent others from using them. If it is necessary to entrust others to purchase drugs for special reasons, the identity certificates of the principal and the trustee shall be provided. Insured persons shall enjoy medical security benefits according to regulations and shall not enjoy them repeatedly. Insured persons have the right to request medical insurance agencies to provide medical insurance consulting services and put forward suggestions for improvement in the use of medical insurance funds.

Nineteenth insured persons shall not take advantage of the opportunity to enjoy medical security benefits to resell drugs, accept cash or physical return or obtain other illegal benefits. Designated medical institutions shall not provide convenience for the insured to resell drugs, and shall not accept cash or physical return or obtain other illegal benefits by enjoying medical security benefits.

Twentieth medical insurance agencies, designated medical institutions and other units and their staff and insured persons shall not forge, alter, conceal, tamper with or destroy medical documents, medical certificates, accounting vouchers, electronic information and other relevant materials, and shall not fabricate medical services to defraud medical insurance funds.

Twenty-first medical insurance funds are earmarked, and no organization or individual may occupy or misappropriate them.

Article 280 of the Criminal Law of People's Republic of China (PRC) uses forged, altered or stolen identity cards, passports, social security cards, driver's licenses and other certificates that can prove identity according to law in activities that should provide identity certificates according to state regulations. If the circumstances are serious, they shall be sentenced to criminal detention or public surveillance and shall also or only be fined. Whoever commits the acts mentioned in the preceding paragraph and constitutes other crimes shall be convicted and punished in accordance with the provisions of heavier punishment.