Central TOX LLC
Round Rock, TX Doing business as Semper FI Labs
- UEI
- PNKHDVRXZC29
- CAGE
- 8SRD9
- Primary NAICS
- 541380 Testing Laboratories and Services
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Other NAICS codes in SAM.gov
-
- 315990 Apparel Accessories and Other Apparel Manufacturing
- 325212 Synthetic Rubber Manufacturing
- 325414 Biological Product (except Diagnostic) Manufacturing
- 334516 Analytical Laboratory Instrument Manufacturing
- 339112 Surgical and Medical Instrument Manufacturing
- 339113 Surgical Appliance and Supplies Manufacturing
- 423450 Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
- 513210 Software Publishers
Show all 21
- 541611 Administrative Management and General Management Consulting Services
- 541618 Other Management Consulting Services
- 541690 Other Scientific and Technical Consulting Services
- 541990 All Other Professional, Scientific, and Technical Services
- 561311 Employment Placement Agencies
- 561320 Temporary Help Services
- 561330 Professional Employer Organizations
- 621420 Outpatient Mental Health and Substance Abuse Centers
- 621498 All Other Outpatient Care Centers
- 621511 Medical Laboratories
- 621999 All Other Miscellaneous Ambulatory Health Care Services
- 623220 Residential Mental Health and Substance Abuse Facilities
- 624310 Vocational Rehabilitation Services
- SAM.gov registration date
- Physical address
- 525 Round Rock W Dr b 240, Round Rock, TX 78681, USA
- Website
- centraltox.com
- Founded
- 2014
- Employees
- 11-50
- Estimated annual revenue
- $1M-$10M
- Industry
-
- Health Care
- Health Care Equipment & Services
- Health Care Providers & Services
- Health Care Services
- SIC code
- 80 Health Services
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $667,536 |
| FY2025 | $586,349 |
| FY2024 | $709,956 |
| FY2023 | $678,081 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Veterans Affairs | $592,815 | |
| 2 | Department of the Army | $74,721 |
Contract vehicles
No active vehicles.
1 expired vehicle
Contract awards
Latest 5 listed here. See the rest on GovTribe.
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| Mobile Cardiac Imaging | Richardson, TX | 621511 Medical Laboratories |
| NEO Services LLC | Dallas, TX | 621511 Medical Laboratories |
| Branch Medical LLC | Ridgefield, WA | 334516 Analytical Laboratory Instrument Manufacturing |
| GB Healthwatch | San Diego, CA | 621511 Medical Laboratories |
| M-Biolabs, Inc. | San Antonio, TX | 541380 Testing Laboratories and Services |
About the company
Central TOX LLC, doing business as Semper FI Labs, operates as a service-disabled veteran-owned small business (SDVOSB) delivering clinical laboratory testing services—including urine and oral drug testing, blood analysis, genetic testing, substance abuse monitoring, and women's health services—to the Department of Veterans Affairs and military service branches as a prime contractor exclusively. The company is a Round Rock, Texas-based, self-certified small disadvantaged business and veteran-owned small business with SBA certifications as both VOSB and SDVOSB (expiring August 4, 2026); it competes predominantly under small-business set-asides (Service-Disabled Veteran-Owned and Total Small Business designations) on its core VA work, though some delivery orders and National Guard awards carry no set-aside.
Central TOX LLC's customer base concentrates almost entirely within the Veterans Health Administration. The Department of Veterans Affairs Veterans Integrated Service Network 2 accounts for 17 awards with $7.6 million in combined potential value—representing 85% of the vendor's total award count and 86% of its combined $8.9 million portfolio value. The Department of the Army's Arizona Army National Guard (7 awards, $327 thousand) and Texas Army National Guard (4 awards, $460 thousand) rank second and third by award count but contribute only 9% of total dollars. The portfolio spans eight customer agencies, but the top three account for 91% of awards and 98% of potential value, reflecting acute customer concentration and recompete risk.
The vendor's primary contract vehicle is an SDVOSB-set-aside indefinite delivery contract with VA VISN 2 (contract 36C24222D0030), awarded February 1, 2022, with a $4.7 million ceiling and completion date of March 31, 2027. This single-award IDC has generated 16 task orders worth $2.8 million in combined potential value for urine and oral drug testing services across multiple VISN 2 locations in New York (Northport, New York Harbor, Bronx) and New Jersey (East Orange), with administrative oversight in Round Rock, Texas. Representative delivery orders include a $530,000 order for Northport VA medical facility (April 1, 2026, through March 31, 2027), a $523.8 thousand order for Northport (April 1, 2025, through March 31, 2026), and a $474.8 thousand order for pricing period 2 (April 1, 2024, through March 31, 2025). The vendor also holds 15 task orders under the Medical Laboratory Testing and Analysis Services Federal Supply Schedule (FSS-621-II), generating $622 thousand in combined potential value across multiple BPAs with the Arizona National Guard, Texas National Guard, U.S. Army Corps of Engineers, and VA VISN 12.
Activity has grown modestly from four awards in 2022 to a peak of nine awards in 2025, settling at six awards year-to-date in 2026. Six awards carrying a combined potential value of $649 thousand reach ultimate completion within the next twenty-four months, creating modest recompete exposure. The vendor has no subcontract footprint; all 33 awards in the portfolio are prime contracts or IDVs. Obligated dollars total $3.3 million (37% of combined potential value), consistent with typical VA delivery-order payment patterns where ceiling values exceed current obligations. The company's capability portfolio aligns tightly with its customer base and vehicle types—reference laboratory testing (28 awards in PSC data) and medical laboratory services (27 awards under NAICS 621511) for military medical readiness and veteran healthcare operations.
SBA capabilities narrative
For over seven years, we have provided versatile, multifaceted professional services to government and private sector clients. With the dynamic evolution of technology, government and industry must work faster, and more efficiently. We strive to be your source for clinical drug monitoring, genetic, blood, substance abuse, women's health, Covid-19 microbiology, and lab consulting services. We consistently support our customers with exceptional quality, flexibility and agility with a commitment to keeping pace with this evolution. Our goal is to provide our clients with complete, cost effective and innovative solutions that exceed customer expectations.
Quick answers
Is Central TOX LLC registered in SAM.gov?
Yes. Central TOX LLC's SAM.gov registration is active through July 20, 2027.
Which contract vehicles does Central TOX LLC hold?
Central TOX LLC holds a place on 1 federal contract vehicle: FSS-621-II.
How much has Central TOX LLC received in federal contracts?
Federal contracts obligated $586,349 to Central TOX LLC in fiscal year 2025 and $2,641,922 in fiscal years 2023 through 2027.
How does Central TOX LLC rank among federal contractors?
Central TOX LLC ranked #63 in NAICS 621511, #84 in NAICS 6215 and #87 in PSC Q3 in FY2025.
What is Central TOX LLC's most recent federal award?
Central TOX LLC's most recent federal contract award is Urine and oral drug testing for james j. Peters (36C24226N0334), from Veterans Integrated Service Network 2 (VHA), on April 7, 2026.
On GovTribe
See Central TOX LLC's full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Funding analysis by agency, NAICS and set-aside
- Similar vendors