#1Brio Clinical Inc
Based in Ontario, CA
Clinical & Reference Laboratories in Ontario, CA
The top-ranked clinical laboratories serving Ontario, CA are Brio Clinical Inc, Individx and Platinum Digestive Health. We list 300 clinical laboratories serving Ontario, CA. 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 Ontario, CA (San Bernardino County). 300 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 Ontario
#2Individx
Serves this area from Rancho Cucamonga, CA (4 mi)#3Platinum Digestive Health
Serves this area from Rancho Cucamonga, CA (4 mi)#4Huntington Reproductive Center Medical Group
Serves this area from Rancho Cucamonga, CA (6 mi)#5Upland Laser Dermatology
Serves this area from Upland, CA (6 mi)#6Healthy Care Clinical Laboratory Inc
Serves this area from Montclair, CA (7 mi)#7Gene On Link LLC
Serves this area from Chino Hills, CA (7 mi)#8Foundation Laboratory
Serves this area from Pomona, CA (10 mi)#9James P Lin Md Inc
Serves this area from Corona, CA (11 mi)#10Pathology Arts Inc
Serves this area from Corona, CA (11 mi)
20 more providers serving this area
- Unilab Corporation, Riverside, CA (11 mi)
- Pacific Reproductive Center, Corona, CA (12 mi)
- Pathcare Diagnostics, Inc, Corona, CA (13 mi)
- Citrus Pathology Medical Group, San Dimas, CA (14 mi)
- Inform Diagnostics Inc, Anaheim, CA (15 mi)
- Caris Mpi, Inc DBA Caris Life Sciences, Anaheim, CA (16 mi)
- Laboratory Corporation Of America, Riverside, CA (16 mi)
- Accurate Clinical Laboratory Corp, Walnut, CA (16 mi)
- L&l Diagnostics, LLC, Covina, CA (17 mi)
- Jp Express Laboratory Inc, Colton, CA (17 mi)
- Avrok Biosciences, Inc, Azusa, CA (20 mi)
- Llu Path Lab, Loma Linda, CA (20 mi)
- Loma Linda Dermatopathology, Loma Linda, CA (20 mi)
- Pain Medicine Associates, Fullerton, CA (20 mi)
- Huntington Reproductive Center Medical Group,, Fullerton, CA (21 mi)
- Equaltox, LLC, North Tustin, CA (21 mi)
- Nkgen Biotech Inc, North Tustin, CA (21 mi)
- Mountain View Medical Laboratory - Orange, Orange, CA (22 mi)
- Prolacta Bioscience Inc, Duarte, CA (22 mi)
- City Of Hope Histocompatibility (hla), Irwindale, CA (22 mi)
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Frequently asked questions
How many clinical laboratories serve Ontario?
We list 300 clinical laboratories serving Ontario, CA: 1 based there and 299 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 Ontario?
The top-ranked clinical laboratories serving Ontario, CA are Brio Clinical Inc, Individx, Platinum Digestive Health, Huntington Reproductive Center Medical Group and Upland Laser Dermatology. The full ranked list, with the official records each provider matched, is on this page.
Which clinical laboratories serving Ontario are verified against official records?
10 of the top 10 match an active official record: Brio Clinical Inc (Centers for Medicare & Medicaid Services), Individx (Centers for Medicare & Medicaid Services), Platinum Digestive Health (Centers for Medicare & Medicaid Services), Huntington Reproductive Center Medical Group (Centers for Medicare & Medicaid Services) and Upland Laser Dermatology (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 .