621111 (if not psychiatry)
621111 Offices of Physicians (except Mental Health Specialists)
This U.S. industry comprises establishments of health practitioners
having the degree of M.D. (Doctor of Medicine) or D.O. (Doctor of
Osteopathy) primarily engaged in the independent practice of general or
specialized medicine (except psychiatry or psychoanalysis) or surgery.
These practitioners operate private or group practices in their own
offices (e.g., centers, clinics) or in the facilities of others, such as
hospitals or HMO medical centers.
Source: NAICS , US Census Bureau