Regulations Governing Contracting and Management of the National Health Insurance Contracted Medical Care Institutions Article 25

Contracted medical care institutions may not refuse to provide medical services to insurance beneficiaries without any legitimate causes, nor can they demand earnest money from insurance beneficiaries.
中文原文 全民健康保險醫事服務機構特約及管理辦法第25條
保險醫事服務機構不得無故拒絕為保險對象提供醫療服務,並不得向保險對象收取保證金。

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