NAICS Code 621320 — Offices of Optometrists

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 62132 (Offices of Optometrists).

Code	621320
Title	Offices of Optometrists
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$9 million in average annual receipts

Official definition (2022 NAICS)

This industry comprises establishments of health practitioners having the degree of O.D. (Doctor of Optometry) primarily engaged in the independent practice of optometry. These practitioners examine, diagnose, treat, and manage diseases and disorders of the visual system, the eye, and associated structures as well as diagnose related systemic conditions. Offices of optometrists prescribe and/or provide eyeglasses, contact lenses, low vision aids, and vision therapy. They 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, and may also provide the same services as opticians, such as selling and fitting prescription eyeglasses and contact lenses.

Cross-References.

Is a business under 621320 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 621320 qualifies as a small business if it does not exceed $9 million in average annual receipts. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — receipts are averaged over the latest 5 fiscal years.

Where 621320 sits in the hierarchy

Level	Code	Title
Sector	62	Health Care and Social Assistance
Subsector	621	Ambulatory Health Care Services
Industry Group	6213	Offices of Other Health Practitioners
NAICS Industry	62132	Offices of Optometrists
National Industry	621320	Offices of Optometrists

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
8042	Offices and Clinics of Optometrists

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.