One word, MONEY. Seriously my former family doctor closed his practice to work at one of these facilities. When I asked him why he told me they were after him fir a while and he made them an offer he thought they would refuse, they accepted. He said he now makes 3 times the money he used to make. If a patient didn't have insurance he would charge 85 for the visit and if you had insurance he would bill 250 to the insurance company and they paid him 85 but the insured wasn't responsible for the difference. Being I had insurance but a high deductible (pre ACA law) I always paid out of pocket. When I went to the new place where he was at I was going to pay cash and he said not to do that as it would cost me 150.00 so I put it through my insurance.

One time on FB I seen someone posted a message looking for a new doctor as her doctor went to one of those medical facilities and she would wait longer than she would when he had his own practice. I private messaged her and asked her if her doctor was the name of the doctor that I seen and she replied back it was. We both had him and were fed up with the service provided at the new facility. It was even at one point I set a timer when he came into the exam room. He asked why and I told him the bill seems to be higher when I am in here longer and at the other place you never charged more if it took longer. He wasn't happy with my response. I think he probably lost a lot of patients because of the move. The last I heard is he relocated to Tennessee.