SEOUL – The National Health Insurance Service (NHIS) of South Korea has publicly acknowledged significant errors in its financial balance statistics concerning foreign subscribers, primarily those from China, raising serious questions about the accuracy of data used to assess the impact of foreign beneficiaries on the national healthcare system.

The revelations, brought to light by Rep. Kim Mi-ae of the People Power Party, a member of the National Assembly's Health and Welfare Committee, reveal substantial discrepancies in previously reported figures. The NHIS has attributed these errors to both manual calculation mistakes and inaccuracies in classifying national codes.

Key errors include:

2020 Revision: Initially reported as a 23.9 billion won deficit for Chinese subscribers, the figure was revised to a 36.5 billion won surplus due to manual calculation errors.
2023 Revision: A reported 64 billion won deficit was corrected to a 2.7 billion won deficit, a 61.3 billion won difference, due to errors in national code classification.
While the NHIS maintains that the overall financial balance of the health insurance system remained unaffected, the errors significantly altered the reported financial balance by country. Notably, China has been the only one of the top ten foregin subscriber nations to nearly always show a deficit.

The errors have significant political implications. The faulty data had been used to support claims of "free riding" by Chinese nationals on the Korean healthcare system. The revised figures now undermine those claims, potentially reshaping public discourse on the issue.

In response, the NHIS has acknowledged the errors, attributing them to the ad-hoc nature of the statistics, which are generated upon request rather than through regular, standardized reporting. The agency has emphasized that no actual financial losses occurred due to the errors but conceded that the credibility of its data has been compromised.

"We recognize the importance of accurate data and are committed to improving our data collection and analysis processes to prevent such errors in the future," an NHIS spokesperson stated.

The incident has highlighted the critical need for robust data management and quality control within the NHIS to ensure the reliability of information used for policy decisions and public discourse. The agency has pledged to implement enhanced measures to guarantee the accuracy of its statistics moving forward.