“Receipts for the nation’s 582,733 ambulatory health care services establishments (NAICS 621) totaled $825.7 billion in 2012, up 23.5 percent from $668.5 billion in 2007, according to the latest economic census statistics released today by the U.S. Census Bureau. Employment in this industry increased 15.1 percent, from 5.7 million in 2007 to 6.6 million in 2012, while annual payroll rose 24.3 percent from $274.7 billion in 2007 to $341.4 billion in 2012. The ambulatory health care industry includes outpatient services, such as offices of physicians and dentists, home health care and medical laboratories, but not inpatient care, such as hospitals and nursing facilities, or social assistance. Offices of physicians (NAICS 62111) accounted for nearly half (49.1 percent) of ambulatory health care services receipts: $405.7 billion in 2012, up 20.6 percent from $336.3 billion in 2007.”