National Pension Act Article 22

The insurer is entitled to request the insured person, beneficiary, or medical care institutions to provide documents related to the Insurance when examining requests for insurance payments or when the central competent authorities consider it necessary when examining controversial cases. The insured person, beneficiary, or the medical care institutions are not entitled to refuse such requests.
中文原文 國民年金法第22條
保險人為審核保險給付或中央主管機關為審議爭議案件認有必要者,得要求被保險人、受益人或醫療機構提供與本保險有關之文件,被保險人、受益人及醫療機構不得拒絕。

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