#1Athari Biosciences Inc
Based in Dulles Town Center, VA
Clinical & Reference Laboratories in Loudoun County, VA
The top-ranked clinical laboratories serving Loudoun County, VA are Athari Biosciences Inc, Clinical Diagnostic Laboratories, LLC and Labcorp Ashburn Psc. We list 63 clinical laboratories serving Loudoun County, VA. 30 of the providers shown match an active record from Centers for Medicare & Medicaid Services, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Clinical & Reference Laboratories serving Loudoun County, VA. 63 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked clinical laboratories for Loudoun County
#2Clinical Diagnostic Laboratories, LLC
Based in Ashburn, VA#3Labcorp Ashburn Psc
Based in Ashburn, VA#4Sunrise Medical Laboratories
Serves this area from Chantilly, VA (15 mi)#5Laboratory Corporation Of America
Serves this area from Chantilly, VA (17 mi)#6Microgen Health, Inc DBA Testgo
Serves this area from Chantilly, VA (17 mi)#7Quest Diagnostics Nichols Institute, Inc
Serves this area from Chantilly, VA (18 mi)#8Virginia Reproductive Labs
Serves this area from Reston, VA (19 mi)#9Mira Genetix
Serves this area from Greenbriar, VA (20 mi)#10Fairfax Health Center
Serves this area from Fair Lakes, VA (21 mi)
20 more providers serving this area
- Shady Grove Fertility-fair Oaks, Fair Oaks, VA (21 mi)
- Cosmosid Ngs Laboratory Services, LLC, Germantown, MD (22 mi)
- Personalized Medicine Care Diagnostic, Germantown, MD (22 mi)
- Cv Path Institute Inc, Gaithersburg, MD (23 mi)
- Mid Atlantic Pathology Services, Mclean Satellite, McLean, VA (23 mi)
- Smithers Pharmaceutical Development Services, Gaithersburg, MD (23 mi)
- Cleardx Clinical Laboratory, Gaithersburg, MD (23 mi)
- Oral Pathology Services, Gaithersburg, MD (23 mi)
- B&b Bio LLC, Gaithersburg, MD (23 mi)
- Genedx, LLC, Gaithersburg, MD (23 mi)
- Clongen Laboratories, Gaithersburg, MD (24 mi)
- Silbiotech, Inc, Ballenger Creek, MD (24 mi)
- Trilliumbio, MD
- Genetix Iq, Inc, VA
- Arthritis & Rheumatism Associate PC, Rockville, MD (24 mi)
- Sam's Medical Laboratory LLC, Montgomery Village, MD (24 mi)
- Shady Grove Andrology Center LLC, MD
- Genesys Biolabs, MD
- Minomic Inc, MD
- Oxford Biodynamics Inc, Ballenger Creek, MD (24 mi)
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Frequently asked questions
How many clinical laboratories serve Loudoun County?
We list 63 clinical laboratories serving Loudoun County, VA: 3 based there and 60 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which clinical laboratories serve Loudoun County?
The top-ranked clinical laboratories serving Loudoun County, VA are Athari Biosciences Inc, Clinical Diagnostic Laboratories, LLC, Labcorp Ashburn Psc, Sunrise Medical Laboratories and Laboratory Corporation Of America. The full ranked list, with the official records each provider matched, is on this page.
Which clinical laboratories serving Loudoun County are verified against official records?
10 of the top 10 match an active official record: Athari Biosciences Inc (Centers for Medicare & Medicaid Services), Clinical Diagnostic Laboratories, LLC (Centers for Medicare & Medicaid Services), Labcorp Ashburn Psc (Centers for Medicare & Medicaid Services), Sunrise Medical Laboratories (Centers for Medicare & Medicaid Services) and Laboratory Corporation Of America (Centers for Medicare & Medicaid Services), and 5 more on this page. Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
What does CLIA certification mean?
CLIA certificates are issued under federal law for laboratories testing human specimens. A certificate of compliance or accreditation covers moderate and high complexity testing; a certificate of waiver covers only simple waived tests.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .
Cities in Loudoun County
Communities served
Brambleton, Stone Ridge, Broadlands, Lansdowne, Cascades, Sugarland Run, Loudoun Valley Estates, Lowes Island, Countryside, Belmont, Purcellville, Dulles Town Center, Moorefield, University Center, Lovettsville, Oak Grove, Arcola, Goose Creek Village, One Loudoun, Middleburg, Round Hill, Hamilton, Kincora, Waterford, Hillsboro, Aldie