How many physician practices are there by size of the group in the US?

I am pretty pleased with myself that I scratched up these numbers!  They come from a reputable federal government source — the National Center for Health Statistics (NCHS).  However, they are unpublished and I had to twirl my almighty Rollodex to get them.

Number of Physician Practices by Practice Size: US 2009-2010

• 109,684 solo practitioners
•   18,854 2-physician practices
•   21,806 3-to-5-physician practices
•     8,842 6-to-10-physician practices
•     2,342 11+ physician practices
• 161,527 total physician practices

Note: These data have been extrapolated by NCHS to represent the entire U.S.

Source: Unpublished data from the National Ambulatory Medical Care Survey.  Provided by Esther Hing at the National Center for Health Statistics, as a result of a telephone conversation and email exchange on Dec. 17, 2014.  Thanks!  Posted by AHA Resource Center (312) 422-2050 rc@aha.org