According to a recent study, 60.7% of physicians

... still work in small practices of 10 or fewer physicians.

Source: "New AMA Study Reveals Majority of America's Physicians Still Work In Small Practices," American Medical Association Press Release, July 8, 2015, http://www.ama-assn.org/ama/pub/news/news/2015/2015-07-08-majority-americas-physicians-work-small-practices.page