미국에서 병원갈때 보험사에 pre authorization을 받고 가야 하나요?

asd 24.***.39.223

제 보험사 홈피Cigna 보니까
Who has to request precertification?
We require that referring (ordering or admitting) physicians request and obtain precertification for in-network services. The rendering provider or facility is responsible for validating that precertification has been obtained for all elective (i.e., non-emergent or non-urgent) services prior to performing the service for patients whose benefit plans require precertification. In certain circumstances, the rendering provider can also request precertification.

의사가 해야한다고 이렇게 되어있네요…. 어케 된 것인지…