621111 Offices of Physicians (except Mental Health Specialists)

Official definition

This U.S. industry comprises establishments of health practitioners having the degree of M.D. (Doctor of Medicine) or D.O. (Doctor of Osteopathic Medicine) 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: US Census Bureau, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

• Establishments of physicians primarily engaged in the independent practice of psychiatry or psychoanalysis are classified in U.S. Industry 621112, Offices of Physicians, Mental Health Specialists.
• Freestanding medical centers primarily engaged in providing emergency medical care for accident or trauma victims and freestanding ambulatory surgical centers primarily engaged in providing surgery on an outpatient basis are classified in U.S. Industry 621493, Freestanding Ambulatory Surgical and Emergency Centers.
• Health maintenance organization (HMO) medical centers are classified in U.S. Industry 621491, HMO Medical Centers.
• Outpatient community health clinics with health practitioners from multiple industries are classified in U.S. Industry 621498, All Other Outpatient Care Centers.
• Establishments of oral pathologists are classified in Industry 621210, Offices of Dentists.
• Establishments of speech or voice pathologists are classified in Industry 621340, Offices of Physical, Occupational and Speech Therapists, and Audiologists.

Source: US Census Bureau, 2022 NAICS cross-references.

Businesses that use this code

• Medical practice (doctor's office)

Activities listed under 621111

The Census index assigns these 41 activities to this code. If your business matches one, this is your code.

• Acupuncturists' (MDs or DOs) offices (e.g., centers, clinics)
• Allergists' offices (e.g., centers, clinics)
• Anesthesiologists' offices (e.g., centers, clinics)
• Cardiologists' offices (e.g., centers, clinics)
• Clinical pathologists' offices (e.g., centers, clinics)
• Dermatologists' offices (e.g., centers, clinics)
• Doctors of osteopathic medicine (DOs, except mental health) offices (e.g., centers, clinics)
• DOs' (doctors of osteopathic medicine, except mental health) offices (e.g., centers, clinics)
• Family physicians' offices (e.g., centers, clinics)
• Forensic pathologists' offices
• Gastroenterologists' offices (e.g., centers, clinics)
• Gynecologists' offices (e.g., centers, clinics)
• Health screening services in physicians' offices
• Immunologists' offices (e.g., centers, clinics)
• Internists' offices (e.g., centers, clinics)
• MDs' (medical doctors, except mental health) offices (e.g., centers, clinics)
• Medical doctors' (MDs, except mental health) offices (e.g., centers, clinics)
• Nephrologists' offices (e.g., centers, clinics)
• Neurologists' offices (e.g., centers, clinics)
• Neuropathologists' offices (e.g., centers, clinics)
• Obstetricians' offices (e.g., centers, clinics)
• Oncologists' offices (e.g., centers, clinics)
• Ophthalmologists' offices (e.g., centers, clinics)
• Orthopedic physicians' offices (e.g., centers, clinics)
• Orthopedic surgeons' offices (e.g., centers, clinics)
• Osteopathic physicians' (except mental health) offices (e.g., centers, clinics)
• Otolaryngologists' offices (e.g., centers, clinics)
• Pathologists' (except oral, speech, voice) offices (e.g., centers, clinics)
• Pathologists', forensic, offices (e.g., centers, clinics)
• Pathologists', neuropathological, offices (e.g., centers, clinics)
• Pathologists', surgical, offices (e.g., centers, clinics)
• Pediatricians' (except mental health) offices (e.g., centers, clinics)
• Physicians' (except mental health) offices (e.g., centers, clinics)
• Plastic surgeons' offices (e.g., centers, clinics)
• Proctologists' offices (e.g., centers, clinics)
• Pulmonary specialists' offices (e.g., centers, clinics)
• Radiologists' offices (e.g., centers, clinics)
• Surgeons' (except dental) offices (e.g., centers, clinics)
• Surgical pathologists' offices (e.g., centers, clinics)
• Urologists' offices (e.g., centers, clinics)
• Walk-in physicians' offices (e.g., centers, clinics)

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 621111

To count as a small business for SBA loans and federal contracts under NAICS 621111, your business (including affiliates) must not exceed $16 million in average annual receipts. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 8620), so treat them as a starting point and check the definition.

• 86210General medical practice activitiesUK SIC
• 86220Specialists medical practice activitiesUK SIC
• 86230Dental practice activitiesUK SIC

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.

Similar codes to compare

• 621112Offices of Physicians, Mental Health Specialists