# NAICS 621511: Medical Laboratories

Breadcrumb: [NAICS codes](https://bidrover.com/naics) › [621511 Medical Laboratories](https://bidrover.com/naics/621511)

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.

- NAICS code: 621511
- Title: Medical Laboratories
- 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
- SBA size standard: $41.5 million average annual receipts
- Open bids on BidRover: 0

## Open bids (0)

No open bids cite this code right now.

## Frequently asked questions

### What is NAICS code 621511?

NAICS 621511 is "Medical Laboratories" in the 2022 North American Industry Classification System, in sector 62 (Health Care and Social Assistance). 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.

### What is the SBA size standard for NAICS 621511?

A business is small under NAICS 621511 at or below $41.5 million average annual receipts, including affiliates (13 CFR 121.201). Confirm the standard named in each solicitation.

### How many government bids are open under NAICS 621511?

No open bid in BidRover cites NAICS 621511 right now. Many state and local notices do not list a NAICS code, so a keyword alert for this work catches more of them.

### How do I get alerts for NAICS 621511 bids?

Save an alert on this page. A free account gets new matching bids by weekly email; the Team plan ($19/mo) sends daily alerts with match scores, the buyer, source link and documents.

## Related NAICS codes

- [339116 Dental Laboratories](https://bidrover.com/naics/339116)
- [339115 Ophthalmic Goods Manufacturing](https://bidrover.com/naics/339115)
- [339113 Surgical Appliance and Supplies Manufacturing](https://bidrover.com/naics/339113)
- [621999 All Other Miscellaneous Ambulatory Health Care Services](https://bidrover.com/naics/621999)
- [621512 Diagnostic Imaging Centers](https://bidrover.com/naics/621512)

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Code titles and definitions: U.S. Census Bureau, North American Industry Classification System (NAICS), 2022 (https://www.census.gov/naics/). Size standards: U.S. Small Business Administration, Small Business Size Standards, 13 CFR 121.201, eCFR text current as of 2026-10-21 (https://www.ecfr.gov/current/title-13/section-121.201).

BidRover lists bids from official public sources. It is not an issuing authority; confirm the NAICS code and size standard named in each solicitation.