Father Lost iPhone and Can't Remember Apple ID or Password. Any chance of finding his phone?

So my father was in the hospital over the weekend, and he came home yesterday but left his phone somewhere. I set up find my iPhone, but of course he doesn't remember his Apple ID or password. Part of what he is going through has effected his mental faculties so I should have expected this. Is there anyway to figure out where his phone is?

Thanks for helping.