621320 — Offices of Optometrists
Description
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 (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Offices of opticians primarily engaged in selling and fitting prescription eyeglasses and contact lenses are
- classified in Industry 456130, Optical Goods Retailers; and
- Offices of physicians primarily engaged in the independent practice of ophthalmology are classified in U.S.
- Industry 621111, Offices of Physicians (except Mental Health Specialists).
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 8042 - Offices and Clinics of Optometrists (via SIC1987:8042→NAICS1997:62132→2002:621320→2007:621320→2012:621320→2017:621320→2022:621320)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC Q511 — Ophthalmology & Optometry
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 621320 valid in 2022? ▾
Yes, 621320 is a valid 6-digit 2022 NAICS national industry code representing 'Offices of Optometrists' under Sector 62 in the official classification index.
What is the SBA size standard for NAICS code 621320? ▾
The Small Business Administration (SBA) has established a small business size standard of $9,000,000 for NAICS code 621320 (Offices of Optometrists), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 621320? ▾
According to official Census Bureau concordance tables, NAICS code 621320 (Offices of Optometrists) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 8042 - Offices and Clinics of Optometrists.
Related Pages & Tools
Further regulatory reference links for NAICS code 621320:
- Sector 62 Directory Hub — List of related industries in the Health Care and Social Assistance sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 621320 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Offices of Optometrists).
- IRS PBA Code for Optometrist — Principal Business Activity tax reporting details.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.