Doin all the legwork for Uber to retrieve lost phone

My phone left in Uber, the Uber account is with the hospital, first hiccup. So couldn't do normal lost item retrieval. I have found the phones current location it's been there since that night, which makes me pretty sure and hopefull I might add, that it's the drivers address spoke to the folks at the hospital all they are willing to do is provide ride receipt #. I'm going to address tommorow, not very sure of myself