Clinical & Reference Laboratories in Los Angeles County, CA

We list 293 clinical laboratories serving Los Angeles County, CA: 153 based there and 140 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.

The top-ranked clinical laboratories serving Los Angeles County, CA are 2080 Century Park Laboratory, 21st Century Diagnostic Laboratory, Accurate Clinical Laboratory Corp, Affiliated Pathologists Medical Group Inc and Ahf Public Health Laboratory. The full ranked list, with the official records each provider matched, is on this page.

10 of the top 10 match an active official record: 2080 Century Park Laboratory (Centers for Medicare & Medicaid Services), 21st Century Diagnostic Laboratory (Centers for Medicare & Medicaid Services), Accurate Clinical Laboratory Corp (Centers for Medicare & Medicaid Services), Affiliated Pathologists Medical Group Inc (Centers for Medicare & Medicaid Services) and Ahf Public Health Laboratory (Centers for Medicare & Medicaid Services), and 5 more on this page. Each badge links to the official record it matched.

By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.

"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.

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.