1. Apply for a refund: the patient or the patient's family can submit a written application to the financial department or customer service department of the hospital, explaining the reasons for the refund and providing relevant supporting materials, such as receipts, payment vouchers, bank statements, etc.

2. Review the application: the hospital reviews the patient's application, verifies the relevant supporting materials, and confirms whether it meets the refund conditions. If further information is needed, the hospital may contact the patient.

3. Refund procedures: If approved, the hospital will go through the refund procedures in accordance with relevant regulations and refund the money to the patient.

The materials that can be returned after the hospital pays the fee are as follows:

1. receipt: a receipt is required to prove the amount and time of payment.

2. Payment voucher: If the expenses are paid by bank transfer, you need to provide corresponding payment vouchers, such as bank transfer receipts and Alipay payment records.

3. Bank statement: If bank transfer is involved, relevant bank statements should be provided for the hospital to verify and pay.

4. Refund application: You need to submit a written refund application to the hospital, explain the reason and amount of the refund, and sign it for confirmation.

5. Diagnosis certificate: If you apply for a refund due to poor treatment effect, you need to provide the corresponding diagnosis certificate to prove that the treatment effect is poor or there is a problem.

6. Other supporting materials: Other supporting materials, such as identity certificate and medical insurance certificate, may be needed according to specific circumstances.

To sum up, the specific application materials may vary from hospital to hospital. If patients need to apply for a refund of hospitalization expenses, it is recommended to contact the financial department or customer service department of the hospital first to understand the specific application materials and procedures. At the same time, when applying for a refund, patients need to provide comprehensive and accurate proof materials as much as possible so that the hospital can handle the application in time.

Legal basis:

Article 584 of the Civil Code of People's Republic of China (PRC)

If one party fails to perform its contractual obligations or fails to perform its contractual obligations in conformity with the agreement, thus causing losses to the other party, the amount of damages shall be equivalent to the losses caused by the breach of contract, including the benefits that can be obtained after the performance of the contract; However, it shall not exceed the losses that the breaching party foresaw or should have foreseen when concluding the contract.