2026 National Health Insurance Refund Lookup & Claim

If you paid insurance premiums twice or by mistake, or paid more than the statutory out-of-pocket amount, you may be eligible for a National Health Insurance refund. Check for unpaid amounts through the refund inquiry and application service on the National Health Insurance Service website and request payment to an account in your name. There is no common deadline, and you must apply before the statute of limitations expires for each case.

Based on a National Health Insurance Service post dated February 4, 2026

How to Check and Apply Immediately

Before applying, prepare a login method for identity verification and an account in your name. If you have a notice, also check the eligible recipient and reference number. Additional documents are required when an agent or heir applies.

1. Open the National Health Insurance Service refund inquiry and application page.
2. Log in under the appropriate category: individual or workplace.
3. Check the types of unpaid refunds in the inquiry results.
4. Verify the eligible recipient and the amount available for application.
5. Enter an account in your name and your contact information.
6. If applying as an agent or heir, submit the specified documents.
7. Confirm that the application was received and check the individual application deadline again.

The amount shown on the screen is the unpaid amount calculated by the Service. Not every insured person will have a refund. If there are no results, it means there are currently no unpaid cases recorded online.

Comparison of Refund Types

The three types of refunds differ in how they arise. Overpaid insurance premium refunds arise from insurance premium payment records. The other two types arise after using a medical institution.

An out-of-pocket payment refund returns an amount that was overcharged. A refund for exceeding the maximum is calculated by totaling recognized medical expenses that were lawfully paid over the year. The two items do not use the same calculation structure.

Non-covered services and other items may be excluded from the maximum calculation. Individual maximums also vary by income and the applicable year. The exact refund amount must be confirmed through the Service’s inquiry results.

Difference Between Reduced Out-of-Pocket Rates and Refunds

A reduced out-of-pocket rate lowers the percentage borne by the patient at the treatment stage. A refund is a subsequent settlement of an amount already paid. Reduced outpatient medical expenses for premature infants and low-birth-weight infants must also be distinguished from refunds.

Summary by Eligibility Status

Available application items vary depending on insurance eligibility and the actual eligible recipient. The person who logs in is not always the person who will receive the money. First check the eligible recipient shown on the inquiry screen.

A refund may arise from past payments even if your eligibility status has changed. You may still need to check directly after leaving a job or switching to self-employed insured status. Do not determine refund eligibility based solely on your current status.

Conditions for Applications Using Your Own Account or by an Agent or Heir

As a rule, online applications require an account in the eligible recipient’s name. Using another person’s account may require additional verification. Check that the account holder entered matches the eligible recipient.

Applications by an agent may require documents proving the authorization relationship. Applications by an heir may require documents confirming the death and family relationship. The specific documents vary depending on the reason for the refund and the number of heirs.

Check the required documents in the following order.

1. Check the eligible recipient on the refund payment application.
2. Check the required documents on the Service’s screen or notice.
3. An agent should prepare a power of attorney and identification documents.
4. An heir should prepare documents establishing the family and inheritance relationships.
5. If anything is unclear, check with the relevant branch office before submission.

Application Deadlines and Statute of Limitations

There is no single annual deadline that applies to all refunds. Each refund has a different date of occurrence and payment notice date. Check the application period on the inquiry screen or notice.

Under the National Health Insurance Act, a 3-year statute of limitations may generally apply to rights related to insurance benefits and insurance premium refunds. However, the starting point and whether the limitation period is interrupted may differ for each right. If an expiration date appears on the screen, check that date first.

If you delay applying, the limitation period may expire. Your right is not automatically extended even if you did not receive a notice. If an amount appears, begin by preparing the required documents.

If You Did Not Receive a National Notification Service Notice

National Notification Service alerts are a supplementary means of informing you that a refund exists. A health and pension insurance premium refund notification service has been operating since 2026. Not receiving an alert does not mean that there is no unpaid amount.

Your contact information may have changed, or you may not use the notification service. The timing at which eligibility for payment is finalized also varies by case. Regardless of alerts, check directly on the Service’s website.

A National Notification Service notice alone does not complete a refund application. Whether an application has actually been submitted is determined by the Service’s receipt status. You must confirm both account registration and the application completion screen.

Next Steps by Inquiry Result

The required action varies depending on the inquiry result. Do not immediately enter an account based only on the amount. First verify the refund type and eligible recipient.

Common Mistakes

The most common misunderstanding is that all medical expenses are included in the maximum system. Some items, such as non-covered services, may be excluded. The total amount actually paid at the hospital may differ from the recognized out-of-pocket amount.

The following mistakes can also delay an application.

• Mistaking a National Notification Service alert for notice that the refund has been completed.
• Logging in directly through a link in a text message.
• Entering an account in a family member’s name without separate verification.
• Treating an employee insured person’s workplace refund as an individual refund.
• Failing to check the application deadline for the amount shown.
• Treating a reduced out-of-pocket rate and a subsequent refund as the same system.

How to Avoid Refund Impersonation Scams

Instead of using a link in a text message, enter the Service’s address directly to access the website. It is also safer to avoid search advertisements and third-party application websites. You can verify whether a refund is available on the Service’s login page.

Do not judge authenticity solely by the sender shown in the alert. If you are asked for your account password or all information from your security card, do not enter it. For suspicious communications, check the contact information on the National Health Insurance Service’s main website before making an inquiry.

Official system criteria can be found in the National Health Insurance Act and its Enforcement Decree. Out-of-pocket payment refunds are also explained on the Service’s health insurance information page. Details of the new National Notification Service notices can be found in the Service’s 2026 post.