1. Review medical insurance expenses: The third party needs to review the medical insurance expenses submitted by medical institutions to ensure the authenticity and rationality of the expenses. The contents of the audit include medical records, diagnosis certificates, doctor's orders, drugs and treatment items, etc.

2. Payment of medical insurance expenses: The third party needs to pay medical insurance expenses according to the provisions of the medical insurance policy to ensure that the use of medical insurance funds conforms to laws, regulations and policies.

3. Supervision of medical insurance fund: A third party is needed to supervise the medical insurance fund to prevent it from being abused or misappropriated. The contents of supervision include the income and expenditure, use and balance of the medical insurance fund.