#1Precision Labs LLC
Serves this area from Chesterfield, MO (13 mi)
Clinical & Reference Laboratories in O'Fallon, MO
The top-ranked clinical laboratories serving O'Fallon, MO are Precision Labs LLC, Creative Testing Solutions (cts St Louis) and Aim Laboratories, LLC. We list 15 clinical laboratories serving O'Fallon, MO. 15 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 O'Fallon, MO (St. Charles County). 15 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 O'Fallon
#2Creative Testing Solutions (cts St Louis)
Serves this area from Maryland Heights, MO (14 mi)#3Aim Laboratories, LLC
Serves this area from Bridgeton, MO (16 mi)#4Geneoscopy, Inc
Serves this area from Maryland Heights, MO (17 mi)#5Mogene, LLC
Serves this area from Maryland Heights, MO (17 mi)#6Quest Diagnostics
Serves this area from Maryland Heights, MO (17 mi)#7Midwest Innovation Laboratory LLC
Serves this area from Creve Coeur, MO (17 mi)#8Wcp Laboratories, Inc
Serves this area from Maryland Heights, MO (18 mi)#9Corelab Diagnostics
Serves this area from MO#10Mid-america Pathology Consultants
Serves this area from MO
5 more providers serving this area
- American Health Mw, LLC, Creve Coeur, MO (19 mi)
- Avertest LLC DBA Averhealth, Hazelwood, MO (19 mi)
- Thyroid Specialty Laboratory, Inc, Fenton, MO (23 mi)
- Md Diagnostics LLC, Green Park, MO (27 mi)
- Semc Pathology LLC, Highland, IL (57 mi)
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Frequently asked questions
How many clinical laboratories serve O'Fallon?
We list 15 clinical laboratories serving O'Fallon, MO: 0 based there and 15 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 O'Fallon?
The top-ranked clinical laboratories serving O'Fallon, MO are Precision Labs LLC, Creative Testing Solutions (cts St Louis), Aim Laboratories, LLC, Geneoscopy, Inc and Mogene, LLC. The full ranked list, with the official records each provider matched, is on this page.
Which clinical laboratories serving O'Fallon are verified against official records?
10 of the top 10 match an active official record: Precision Labs LLC (Centers for Medicare & Medicaid Services), Creative Testing Solutions (cts St Louis) (Centers for Medicare & Medicaid Services), Aim Laboratories, LLC (Centers for Medicare & Medicaid Services), Geneoscopy, Inc (Centers for Medicare & Medicaid Services) and Mogene, LLC (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 .