Clinical & Reference Laboratories in Orange, CA

We list 391 clinical laboratories serving Orange, CA: 5 based there and 386 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 Orange, CA are Genetics Center, Mountain View Medical Laboratory - Orange, Newport Harbor Pathology, Uc Irvine Dermatopathology Laboratory and Unilab Corporation DBA Quest Diagnostics. 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: Genetics Center (Centers for Medicare & Medicaid Services), Mountain View Medical Laboratory - Orange (Centers for Medicare & Medicaid Services), Newport Harbor Pathology (Centers for Medicare & Medicaid Services), Uc Irvine Dermatopathology Laboratory (Centers for Medicare & Medicaid Services) and Unilab Corporation DBA Quest Diagnostics (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.