"But as large health systems seize an ever-growing share of the market, they accumulate more leverage to demand higher prices from patients and insurers. And they're not shy about using it. When a hospital acquires a physician practice, prices for healthcare services increase by more than 14%, according to research published in the Journal of Health Economics. Those higher costs don't translate to higher salaries for doctors. A recent Health Affairs study found that a physician's salary actually decreases after his or her practice is acquired by a hospital...There's no evidence that higher prices lead to better care for patients. In fact, practices owned by a hospital report higher preventable hospital admission and readmission rates among their patients than small, independent practices, according to a report published by the Annals of Family Medicine."
— Forbes
https://www.forbes.com/sites/sallypipes/2022/05/09/is-the-end-of-private-practice-nigh/?sh=7940ccaf3bf5