Not my PCP but another specialist (hematologist) referred me to a rheumatologist, and she was the absolute worst doctor I had ever seen in my life. I finally switched to someone else and told my hematologist how bad she was, and he said he had heard others say similar! Couldn’t believe he had continued to recommend her, since I liked him and trusted him. I think they just don’t have a great way to builf these connections outside of their immediate practice areas. That said my PCP recommended my hematologist, so at least that was a good rec.