CathInfo.com

Just a note for consideration.  What is a private doctor?  The overwhelming number of doctors in the US are not in business for themselves.  

Didn't you just answer your own question?  While almost every doctor has to start out as part of a larger conglomerate, a fair number spin off their own private practices.  So, for instance, the famous Dr. Tenpenny has her clinic not far from where I live.  Unfortunately, it's unaffordable to most of us becaue they don't accept (and can't accept) normal medical insurance.

20 key insights into the world of independent physicians; 33% of US physicians are independent
Megan Wood - Wednesday, October 19th, 2016
https://www.beckershospitalreview.com/hospital-physician-relationships/20-key-insights-into-the-world-of-independent-physicians-33-of-us-physicians-are-independent.html

…and the trend continues.

In 2016!  That was six years ago.  Doctors were given time to switch over, a lot of which depended upon taking certain steps by deadlines that differed from specialty to specialty and place to place.  I was on doctors numbers two and three of five in 2016. From 2018-2019, I’d lost all five and went about a year and a half with a doctor assigned to me by my employer sponsored insurance.  I don’t bother counting this doctor number six because I never so much as spoke with her on the phone or set eyes upon her.  The insurance’s list of PCPs hadn’t been updated in at least five years.  I know that because in calling every doctor I could reasonably travel to, an hour or less, there was one who’d passed away five years ago!  Others weren’t taking patients, no longer took the insurance, had moved, or had retired.  The assigned doc may have been wonderful, but her location in Bridgeport, CT was not acceptable!  The insurance measured distance “as the crow flies,” or, in this case, a hanger the crow to seagull!  They also didn’t take into account the type of area in which the client lived. There’s a huge difference in drive time between, say, 45 miles on open highway in Texas and 45 miles in NYC area. I could take the car ferry, $70 each way by reservation, over an hour each way, then drive 12 miles to the office, or drive around Long Island Sound through NYC, paying for bridges and tolls, taking anywhere from three and a half to six hours depending upon time of day, or walk on the ferry, taking a taxi both ways!?!  In 2019 I had a doctor for six months and it all went south, job, housing, insurance, everything, the end of March 2020.   Now, if I need emergency care, I’ll fall under Medicaid in the state where I’m at, at least for the time being.  It’s no big deal because there’s only one hospital in a large geographic area that is very poor except for the summer residents from Boston.  They can’t turn anyone away for lack of insurance or inability to pay.  In fact, people here illegally needn’t give their real names or addresses, if they have one.