大额补充医疗保险是指在基本医疗保险统筹基金最高支付限额以上建立的,由社会保险机构统一制定管理制度,代参保职工办理缴费,并转交保险公司进行风险承保的商业补充医疗保险。大额补充医疗保险业务的经营具有受外界影响大、风险 Large supplementary medical insurance refers to the establishment of the basic medical insurance co-ordination fund above the maximum payment limit, the social insurance agencies to develop a unified management system, on behalf of the insurance staff to handle the payment, and forwarded to the insurance company risk underwriting commercial supplementary medical insurance. The operation of large supplementary medical insurance business has great influence and risk from the outside world