包括联合健康和CVS健康旗下安泰在内的美国健康保险公司周四表示，将转向提供更多限制参保用户医疗服务提供者访问的联邦医疗保险优势计划。
US health insurers including UnitedHealthcare and CVS Health's Aetna will shift to offer more Medicare Advantage plans that limit provider access for enrolled users, the companies said on Thursday.