Cochlear implant

Insurance query

We have started hospital cashless insurance process for cochlear implant.

Now hospital is asking us to pay implant (med-el in our case) price upront and later they will refund once insurance pays them(which is typically 30-60 days after surgery).

Insurance agent guaranteed that he will approve cashless request once we provide them required details.

Do we need to oay the hospital upfront and will they be going to give refund later? cant hospitals pay upfront and claim from insurance?

pls suggest