What are you're expectations of their involvement? They general require one visit to "get to know you" and establish you as a patient. They might not make it really personal, but they just need to examine you and make sure your history is correct. Then it's just a matter of contacting them when you need care.

Usually your insurance web portal will have a search feature for providers and tell you if they're in-network. I would guess there could be third party ones too. I remember seeing info like location, ratings, reviews, and certifications.

It should not be very challenging.