Regulations Governing the Production and Issuance of the National Health Insurance Card and Data Storage and Access Article 7

A beneficiary may set up a password on his or her NHI Card to restrict access to his or her personal Insurance data, data on medical services, and data on health administration.
中文原文 全民健康保險保險憑證製發及存取資料管理辦法第7條
保險對象得設定健保卡密碼,限制讀取其本人之健保資料、醫療專區資料及衛生行政專區資料。

English translation for reference only; the Chinese text prevails. Not legal advice.