Clinical & Reference Laboratories in Riverside, CA

We list 238 clinical laboratories serving Riverside, CA: 2 based there and 236 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 Riverside, CA are Laboratory Corporation Of America, Unilab Corporation, Pacific Reproductive Center, Jp Express Laboratory Inc and James P Lin Md Inc. 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: Laboratory Corporation Of America (Centers for Medicare & Medicaid Services), Unilab Corporation (Centers for Medicare & Medicaid Services), Pacific Reproductive Center (Centers for Medicare & Medicaid Services), Jp Express Laboratory Inc (Centers for Medicare & Medicaid Services) and James P Lin Md Inc (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.