According to a recent survey of physicians:

• 30.3% are in solo practices
• 39.7% are in practices with 2 to 9 physicians
• 9.3% are in practices with 10 to 20 physicians
• 20.7% are in practices with more than 20 physicians

Source: "2014 Physicians Compensation Survey," Physicians Practice, November 13, 2014, http://www.physicianspractice.com/physician-compensation-survey/2014-physicians-compensation-survey?cid=PR11202014