Clinical & Reference Laboratories in Costa Mesa, CA

We list 391 clinical laboratories serving Costa Mesa, CA: 3 based there and 388 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 Costa Mesa, CA are Genex Laboratory, Laboratory Services, LLC, South West Science Labs, LLC, West Coast Bio Lab LLC and Huntington Reproductive Center. 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: Genex Laboratory (Centers for Medicare & Medicaid Services), Laboratory Services, LLC (Centers for Medicare & Medicaid Services), South West Science Labs, LLC (Centers for Medicare & Medicaid Services), West Coast Bio Lab LLC (Centers for Medicare & Medicaid Services) and Huntington Reproductive Center (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.