I think it's a net positive. I've almost never referred a clinic, but have referred individuals.
1. This is a very personal relationship environment.
2. If you read some of the reviews in this space (at least the ones I've seen) there are tons of "love the doctor, office is horrible to get in touch with" types of reviews but they still have decent ratings.
the challenge may be non-owned asset when / if provider moves, etc. but that's just reality and should have a plan in place.