From the Bureau of Labor Statistics, Occupational Outlook Handbook:

“Physicians examine patients; take medical histories; prescribe medications; and order, perform, and interpret diagnostic tests. They often counsel patients on diet, hygiene, and preventive healthcare.

“There are two types of physicians, with similar degrees: M.D. (Medical Doctor) and D.O. (Doctor of Osteopathic Medicine). Both use the same methods of treatment, including drugs and surgery, but D.O.s place additional emphasis on the body's musculoskeletal system, preventive medicine, and holistic (whole-person) patient care. D.O.s are most likely to be primary care physicians, although they can be found in all specialties.”

Source: 2019 American Community Survey (ACS), 1-Year Estimates.

Note: The table image above shows the section for physicians. Click on the image to see the full table in Data.census.gov. To see data dating back to 2010, click the “Product” dropdown under the table title.

From the Library > America Counts: Stories Behind the Numbers:

Source: Quarterly Services Survey, 2010 to 2021:

Source: 2018 County Business Patterns (CBP).

• NAICS 6211, Offices of physicians
• NAICS 621111, Offices of physicians (except mental health specialists)
• NAICS 621112, Offices of physicians, mental health specialists
• NAICS 622, Hospitals

Source: 2018 Nonemployer Statistics (NES). 

• NAICS 6211, Offices of physicians
• NAICS 621111, Offices of physicians (except mental health specialists)
• NAICS 621112, Offices of physicians, mental health specialists

Source: 2017 Annual Business Survey (ABS).

Source: 2017 Economic Census.