NAICS Code 621511 — Medical Laboratories
National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 2 national industries under 62151 (Medical and Diagnostic Laboratories).
| Code | 621511 |
|---|---|
| Title | Medical Laboratories |
| Level | National Industry (6-digit) |
| Edition | NAICS 2022 edition |
| SBA size standard | $41.5 million in average annual receipts |
Official definition (2022 NAICS)
This U.S. industry comprises establishments known as medical laboratories primarily engaged in providing analytic or diagnostic services, including body fluid analysis, generally to the medical profession or to the patient on referral from a health practitioner.
Illustrative Examples:
Blood analysis laboratories
Medical pathology laboratories
Medical bacteriological laboratories
Medical testing laboratories
Medical forensic laboratories
Cross-References.
Is a business under 621511 "small"?
Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 621511 qualifies as a small business if it does not exceed $41.5 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 621511 sits in the hierarchy
| Level | Code | Title |
|---|---|---|
| Sector | 62 | Health Care and Social Assistance |
| Subsector | 621 | Ambulatory Health Care Services |
| Industry Group | 6215 | Medical and Diagnostic Laboratories |
| NAICS Industry | 62151 | Medical and Diagnostic Laboratories |
| National Industry | 621511 | Medical Laboratories |
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 |
|---|---|
8071 | Medical Laboratories |
Related National Industry codes
621512— Diagnostic Imaging Centers
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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.