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NAICS Code· 621511

NAICS 621511: Medical Laboratories

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.Show more

NAICS 621511 – Medical Laboratories encompasses the operation of facilities that perform clinical diagnostic testing on human specimens, including blood, tissue, and bodily fluids, to support medical diagnosis, treatment, and public health surveillance. Services under this code include molecular diagnostics, immunology assays, microbiological cultures, cytology, and toxicology screening, often delivered through automated analytical platforms and regulated under CLIA, CAP, and ISO standards.

102
Active Contracts
$907.3M
Total Obligations (12mo)
1.4K
Awarded Contracts (12mo)
297
Contractors Awarded (12mo)
1
Median Bidders per Award
+15.5%
YoY Growth

Industry Spending Overview

Federal obligations, top contractors and agencies, and related industry codes for NAICS 621511.

AI Industry Description

NAICS 621511 – Medical Laboratories encompasses the operation of facilities that perform clinical diagnostic testing on human specimens, including blood, tissue, and bodily fluids, to support medical diagnosis, treatment, and public health surveillance. Services under this code include molecular dia...

NAICS 621511 – Medical Laboratories encompasses the operation of facilities that perform clinical diagnostic testing on human specimens, including blood, tissue, and bodily fluids, to support medical diagnosis, treatment, and public health surveillance. Services under this code include molecular diagnostics, immunology assays, microbiological cultures, cytology, and toxicology screening, often delivered through automated analytical platforms and regulated under CLIA, CAP, and ISO standards. In the federal contracting landscape, these laboratories support mission-critical health monitoring for diplomatic personnel, military deployments, global health initiatives, and emergency response operations, frequently through outsourced contracts with specialized service providers rather than in-house federal labs. The primary contractor in this sector is ALTITUDE TECHNOLOGIES INC., a mid-sized firm with expertise in deploying scalable, compliant laboratory solutions for federal clients. The competitive landscape is dominated by specialized service providers with strong regulatory compliance credentials, rather than large primes, reflecting the technical and accreditation-intensive nature of clinical lab services. Contracting typically requires CAP accreditation, CLIA certification, and experience in high-complexity testing environments. The Department of State is the leading federal agency awarding contracts under this NAICS code, primarily to support medical surveillance and diagnostic services for U.S. embassies, consulates, and overseas personnel. Demand is driven by global health security programs, employee wellness mandates, and biothreat detection protocols in high-risk regions, with contracts often structured as indefinite-delivery/indefinite-quantity (IDIQ) vehicles requiring rapid response capabilities. The market is characterized by high barriers to entry due to stringent regulatory requirements, but offers consistent opportunity density for accredited, agile providers with proven experience in international health logistics and federal compliance. Contractors with dual capabilities in both clinical diagnostics and expeditionary lab support are best positioned to compete for sustained, mission-critical awards.

Top Contractors

Companies with the highest total award value under NAICS 621511, ranked by dollars won.

Ranked by total awards
CompanyTotal AwardsContracts
LABORATORY CORPORATION OF AMERICA$490.3M301
QUEST DIAGNOSTICS INCORPORATED$218.9M406
FOUNDATION MEDICINE, INC.$21.8M2
CENTER FOR DISEASE DETECTION, LLC$14.0M4
BAYLOR MIRACA GENETICS LABORATORIES LLC$11.6M2
ARUP LABORATORIES INC$9.8M13
OREGON HEALTH & SCIENCE UNIVERSITY$9.0M1
FULGENT THERAPEUTICS LLC$6.6M2
LABORATORY CORPORATION OF AMERICA$5.8M1
OREGON HEALTH & SCIENCE UNIVERSITY$5.6M5

Top Agencies

Federal agencies directing the most contract spending toward NAICS 621511.

Dha Enterprise Medical Support Ems-Cd1 award$364.7M
Department Of Veterans Affairs488 awards$245.8M
Department Of Defense265 awards$86.9M
245-NETWORK Contract Office 5 (36C245)2 awards$49.9M
247-NETWORK Contract Office 7 (36C247)1 award$46.0M
Department Of Health And Human Services124 awards$40.2M
262-NETWORK Contract Office 22 (36C262)1 award$30.9M
260-NETWORK Contract Office 20 (36C260)3 awards$15.8M
Department Of Justice399 awards$7.8M
257-NETWORK Contract Office 17 (36C257)4 awards$4.7M

Competition

How many companies historically bid on federal awards in NAICS 621511, from bidder counts reported on USAspending.

Usually Single-Bid

Half or more of reported awards drew exactly one bidder, usually a sign of incumbent-held work rather than an open field. · 38,530 reported awards

Median Bidders

1

Per reported award, all-time

Single-Bid Awards

73%

Share of reported awards with one bidder

10+ Bidder Awards

1%

Share of reported awards with 10+ bidders

Reported Awards

0

76% of 50,417 total awards

How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.

Industry FamilyCompetitionMedian BiddersSingle-BidBidder MixReported Awards
621511This Code
Medical Laboratories
Usually Single-Bid173%
38,53076% of 50,417
62151NAICS Industry
Usually Single-Bid172%
47,90577% of 61,866
6215Industry Group
Medical and Diagnostic Laboratories
Usually Single-Bid172%
47,90577% of 61,866
621Subsector
Usually Single-Bid165%
305,28684% of 361,937
62Sector
Health Care and Social Assistance
Usually Single-Bid171%
550,37684% of 657,209

Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.

Related NAICS Codes

Industries similar to Medical Laboratories, by shared sector, subsector, and industry group.

Diagnostic Imaging Centers

This U.S. industry comprises establishments known as diagnostic imaging centers primarily engaged in...
621512Same Industry GroupHigh Similarity

Offices of Physicians (except Mental Health Specialists)

This U.S. industry comprises establishments of health practitioners having the degree of M.D. (Docto...
621111Same SubsectorMedium Similarity

Offices of Physicians, Mental Health Specialists

This U.S. industry comprises establishments of health practitioners having the degree of M.D. (Docto...
621112Same SubsectorMedium Similarity

Offices of Dentists

This industry comprises establishments of health practitioners having the degree of D.M.D. (Doctor o...
621210Same SubsectorMedium Similarity

Offices of Chiropractors

This industry comprises establishments of health practitioners having the degree of D.C. (Doctor of ...
621310Same SubsectorMedium Similarity

Offices of Optometrists

This industry comprises establishments of health practitioners having the degree of O.D. (Doctor of ...
621320Same SubsectorMedium Similarity

Offices of Mental Health Practitioners (except Physicians)

This industry comprises establishments of independent mental health practitioners (except physicians...
621330Same SubsectorMedium Similarity

Offices of Physical, Occupational and Speech Therapists, and Audiologists

This industry comprises establishments of independent health practitioners primarily engaged in one ...
621340Same SubsectorMedium Similarity

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NAICS 621511 FAQ

Frequently Asked Questions

NAICS code 621511 covers Medical Laboratories. 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.

Recently Posted in Medical Laboratories

NAICS: 621511
New
SLED
Request for Letters of Interest – Use of Clinic Space for Blood Draw Services - Santa Barbara County Santa Maria and Lompoc Health Care Centers
Solicitation # LOI
The County of Santa Barbara is seeking letters of interest from qualified providers for the use of clinic space to provide blood draw services at the Santa Maria and Lompoc Health Care Centers. This sources-sought opportunity is designed to identify potential partners capable of operating within these specific California facilities to enhance local healthcare access. Interested parties must submit their letters of interest by the deadline of September 30, 2026. Primary inquiries and submissions should be directed to Edward Teyber, who serves as the point of contact for this solicitation.
County of Santa Barbara

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2 days ago

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NAICS: 621511
New
Federal
Q301-- Molecular Thyroid Testing
Solicitation # 36C25926Q0430
Solicitation 36C25926Q0430 is a request for a five-year firm-fixed price Blanket Purchase Agreement to provide molecular testing for thyroid specimens at the Rocky Mountain Regional VA Medical Center in Aurora, Colorado. The contractor must provide accurate testing to assess cancer risk for indeterminate results within a 14-day turnaround time, including the supply of all necessary collection and transport materials. This unrestricted procurement falls under NAICS code 621511 and will be awarded on an all-or-nothing basis to the offeror representing the best value based on technical capability, past performance, and price. Interested parties must submit their quotes via email to the designated contacts by 8:00 AM MT on September 10, 2026. Submissions must be divided into four volumes: technical capability, past performance including two recent references and questionnaires, pricing via the provided line-item schedule, and completed BPA terms. All questions must be submitted in writing by August 31, 2026. Offerors are cautioned against contacting any VA personnel other than the Contracting Officer or Contract Specialist during the solicitation process.
Network Contract Office 19 (36C259)

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NAICS: 621511
New
Federal
Molecular Thyroid Testing ServicesThe Department of Veterans Affairs, through Network Contract Office 19, is seeking a subcontractor to provide molecular thyroid testing services for specimens with indeterminate cytology to assess cancer risk. The selected provider must ensure high accuracy in testing and adhere to a strict 14-day turnaround time. All services must be performed in full compliance with CLIA, CAP, and HIPAA standards to maintain regulatory and patient privacy requirements. This subcontract opportunity is associated with NAICS code 621511 and will be performed in Aurora, zip code 80045. The solicitation was posted on August 26, 2026, with a response deadline of September 10, 2026, at 2:00 PM.
Network Contract Office 19 (36C259)

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NAICS: 621511
New
Federal
Q301--VISN 22 Semen & Vasectomy Test Kits
Solicitation # 36C26226Q1411
The Department of Veterans Affairs, through the Network Contract Office 22, is soliciting bids for the procurement of Semen and Vasectomy Test Kits under solicitation number 36C26226Q1411. This combined contract opportunity is designated as a total set-aside for small businesses and falls under NAICS code 621511. The response deadline for this requirement is September 8, 2026, at 2:00 PM. Interested parties should direct inquiries to the primary point of contact, Contract Specialist Marcos Diaz, regarding this procurement for the Gilbert, Arizona office.
262-NETWORK Contract Office 22 (36C262)

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2 days ago

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NAICS: 621511
New
Federal
Blood Bank Sample Services
Solicitation # 1333ND26QNB640414
The Department of Commerce NIST is seeking Blood Bank Sample Services to support the Biomolecular Measurement Division of the Material Measurement Laboratory. This effort provides essential biological starting materials required for forensic DNA testing, the production of Standard Reference Materials, inter-laboratory studies, and the publication of allele frequencies to advance biotechnology and healthcare research. This is a total small business set-aside opportunity under NAICS code 621511, with performance taking place in Gaithersburg, Maryland. Amendment 0001 introduces several critical changes to the solicitation, including an updated CLIN structure, a revised Statement of Work, and a reduction of the Not-to-Exceed unit quantity from 500 to 250. Additionally, the amendment provides responses to industry questions and extends the deadline for offer submissions. Interested parties must submit their responses by September 2, 2026, at 3:00 PM.
Department Of Commerce Nist

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NAICS: 621511
New
SLED
Tuberculosis (TB) Testing and Health Certification Services
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NAICS: 621511
New
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Laboratory Support Services for Occupational TestingThis subcontract for Laboratory Support Services for Occupational Testing is issued by the Department of Defense for the W7MX Uspfo Activity CA ARNG. The selected provider will be responsible for conducting essential health screenings for CAARNG personnel, including audiometry, vision testing for color, depth, and field, vital signs, and anthropometric measurements. All results must be documented and reported through secure channels. The opportunity is designated as a total Small Business Set Aside under NAICS code 621511. Performance will take place in the 95826 zip code area. The solicitation was posted on August 25, 2026, with a response deadline of September 8, 2026.
W7MX Uspfo Activity Ca Arng

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NAICS: 621511
Closed
Federal
Q301--Notice of Intent to Sole Source - VISN4 Reference Laboratory Services
Solicitation # 36C24426Q0929
The Department of Veterans Affairs, specifically VISN 04 Healthcare Facilities, intends to award a sole source contract to Laboratory Corporation of America for reference laboratory services. This procurement, identified by solicitation number 36C24426Q0929 and NAICS code 621511, will be executed as a firm-fixed price, indefinite-delivery, indefinite-quantity contract for a one-year period. The award is being pursued under the authority of FAR 12.102-1 using simplified acquisition procedures. This special notice serves as a formal intent to award a sole source contract rather than a request for competitive proposals. The government maintains full discretion regarding whether to compete the procurement.
244-NETWORK Contract Office 4 (36C244)

POSTED

3 days ago

CLOSED

1 day ago
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NAICS: 621511
New
Federal
Laboratory Sample Collection, Processing, and StorageThis subcontract, issued by the Department of Defense through the Navsup Flc Sigonella Naples Office, focuses on the collection, processing, and secure storage of biological samples, such as blood and urine, within Yemen. The primary objective is to ensure a strict chain of custody for all samples and to provide detailed reporting of any deficiencies to NAMRU-EURAFCENT. The opportunity is categorized under NAICS code 621511 and was posted on August 25, 2026, with a response deadline of September 1, 2026. This project requires specialized laboratory services to maintain the integrity of biological materials in a field environment to support medical or research objectives.
Navsup Flc Sigonella Naples Office

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NAICS: 621511
New
Federal
BPA for Medical Laboratory Testing Services at 18th Medical Group - Kadena Air Base, Japan
Solicitation # HT941026Q2050
The contract is a Blanket Purchase Agreement (BPA) for Medical Laboratory Testing Services at the 18th Medical Group on Kadena Air Base, Japan, issued under solicitation number HT941026Q2050 by the Defense Health Agency Hcd West, Department of Defense. The BPA has a total ceiling value of $50,000 over its five-year period of performance from October 1, 2026, to September 30, 2031, and is structured as a firm-fixed-price agreement for specific laboratory tests including fungal culture and identification, TSPOT-TB testing, and antifungal drug susceptibility tests. The solicitation is unrestricted and invites full and open competition under NAICS code 621511. Contractors must submit a single PDF quotation that includes a capabilities statement addressing technical requirements from the Statement of Work, a completed Quote Sheet with firm-fixed pricing for each line item, and all required representations and certifications. Past performance and technical capability are critical evaluation factors, with technical capability serving as a mandatory pass/fail gate; failure to meet the technical threshold disqualifies a respondent. The evaluation is conducted on a best value basis with past performance carrying greater weight than price. Quote submissions are due by August 11, 2026, and must be emailed to the point of contact, April Delmendo. Performance is required on-site at the 18th Medical Group Laboratory in Building 626, Room LK08, during business hours of 7:30 a.m. to 4:30 p.m., Monday through Friday, excluding U.S. government holidays. The contractor must handle specimen collection daily within these hours, ensuring each sample includes the date, test name, patient name, and last four digits of the patient’s Social Security Number. The contractor is responsible for maintaining current laboratory accreditation, implementing a safety plan compliant with OSHA and Japan Environmental Governing Standards (JEGS), and ensuring all personnel have the necessary military base access credentials with background screening. Contractor staff must wear visible identification at all times and are prohibited from using retired or reserve military titles. Invoicing and payment will be processed electronically via the Wide Area Workflow system with specific routing and DoDAAC codes assigned. The contractor holds full liability for environmental incidents, property damage, and personnel injury, with mandatory reporting within one hour. The contract incorporates numerous FAR clauses related to cybersecurity, trafficking in persons, small
Defense Health Agency Hcd West

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NAICS: 621511
New
Federal
Service and Maintenance for Siemens CA-660 Coagulation Analyzer-Red Lake
Solicitation # 75H70526Q00023
Solicitation 75H70526Q00023 is issued by the Department of Health and Human Services, Bemidji Sub-Area, to secure service and maintenance for a Siemens CA-660 Coagulation Analyzer located in Minnesota. This procurement is designated as a 100 percent Small Business set-aside under NAICS code 621511. Interested offerors must submit their proposals by August 31, 2026, at 2:00 PM CST. Submissions must include a completed bid schedule covering all applicable option years to be considered for the award.
Bemidji Sub-Area

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4 days ago

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NAICS: 621511
Closed
Federal
Onsite Drug Testing Services – Collection and Testing OperationsThe U.S. Secret Service, under the Department of Homeland Security, is seeking a subcontractor to provide comprehensive onsite drug testing services in Washington, D.C. The scope of work includes specimen collection, laboratory analysis, and reporting, which may be conducted at government locations or via mobile facilities. This opportunity is designated as a total Small Business Set Aside under NAICS code 621511. The solicitation was posted on August 24, 2026, with a response deadline of August 26, 2026.
U S Secret Service

POSTED

4 days ago

CLOSED

2 days ago
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