If you have overpaid health insurance premiums or medical bills, you can claim a refund through the National Health Insurance Service's 'Unpaid Refund Inquiry Service.' While commonly referred to as 'health insurance refunds,' they are specifically divided into three categories based on the reason for occurrence and the payment procedure.

According to the National Health Insurance Service on the 3rd, the targets of the integrated unpaid refund inquiry and application service are ▲ copayment refunds ▲ excess copayment ceiling refunds ▲ insurance premium and other collection overpayment refunds.

How to Check Refunds on PC and Mobile Eligibility for a refund can be verified by completing identity authentication on the Service's website and navigating to the 'Refund Inquiry & Application' or 'Integrated Unpaid Refund Inquiry and Application' menu. Mobile users can access the service by installing the dedicated app 'The Health Insurance.'

Reasons for Occurrence and Application Methods by Refund Type 1. Copayment Refund: This occurs when the Health Insurance Review and Assessment Service reviews the medical fees billed by hospitals and pharmacies, and confirms that the patient paid more than the statutory copayment. Based on Article 47 of the National Health Insurance Act, the Service pays the overpaid amount to the subscriber. 2. Insurance Premium Overpayment Refund: This occurs when health insurance premiums are paid twice, or when more is paid than the actual amount due to reasons such as a change in eligibility status or premium adjustments. 3. Excess Copayment Ceiling Refund: This is a system where the Service covers the excess amount when the out-of-pocket medical expenses subject to health insurance over the course of a year exceed the individual cap. Those eligible for a post-fact refund must fill out the payment application form sent by the Service with their personal details and bank account information. Applications can also be made via the website, phone, fax, mail, or by visiting a local branch. However, if you wish to receive the payment into a family member's or another person's account, additional documents such as a medical certificate, family relation certificate, or power of attorney may be required.

• *Refund Payment Dates and Application Deadlines (Key Precautions)**
• Payment Date: Copayment refunds are deposited into the applicant's account within 7 days from the date the payment application form is received. However, the actual deposit timing may vary depending on account verification, document supplementation, or individual processing circumstances.
• Application Deadline: Copayment refunds must be applied for within 3 years from the date the payment application form is received. If not applied for within this period, you may lose the right to claim the refund, so it is essential to check the date of receiving the notice and the type of refund.
• Refund Amount Adjustments and Reversals: The refund amount may be recalculated based on an objection filed by a medical institution or the results of a re-examination. If a portion of the already paid amount is found to be non-refundable, the Service may initiate a reversal procedure.

Caution Regarding Voice Phishing and Fraud Health insurance subscribers and dependents are strongly advised to check their refund eligibility directly on the Service's official website or the 'The Health Insurance' app. Rather than clicking on links in text messages or emails from unclear sources, users should access the official website and app directly. Extra caution is necessary if fees, passwords, or full security card numbers are requested during the refund application process.

Since health insurance refunds are not a single system, if a query confirms you are eligible for a refund, you must accurately verify the refund name, application deadline, and payment account before applying. For detailed processing inquiries, you can contact the National Health Insurance Service Customer Center (1577-1000) or your local branch.

[※ The information provided in this article is intended to help with a general understanding of policies, and actual results may vary depending on individual circumstances and refund eligibility. Government policies are subject to frequent change, so please be sure to check official materials from relevant institutions such as the National Health Insurance Service. This publication assumes no legal or financial responsibility for this information. This article was partially assisted by AI.]