Clinical & Reference Laboratories in Lassen County, CA

We list 8 clinical laboratories serving Lassen County, CA: 0 based there and 8 serving it from nearby. 8 of the top 8 match an active federal or state record, checked on 2026-11-04.

The top-ranked clinical laboratories serving Lassen County, CA are Western Pathology At St Marys Reg Med Ctr, Lab24, LLC, Laboratory Corporation Of America, Shasta Pathology Associates and Unilab Corp DBA Quest Diagnostics. The full ranked list, with the official records each provider matched, is on this page.

8 of the top 8 match an active official record: Western Pathology At St Marys Reg Med Ctr (Centers for Medicare & Medicaid Services), Lab24, LLC (Centers for Medicare & Medicaid Services), Laboratory Corporation Of America (Centers for Medicare & Medicaid Services), Shasta Pathology Associates (Centers for Medicare & Medicaid Services) and Unilab Corp DBA Quest Diagnostics (Centers for Medicare & Medicaid Services), and 3 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.