Clinical & Reference Laboratories in Napa County, CA

We list 5 clinical laboratories serving Napa County, CA: 2 based there and 3 serving it from nearby. 5 of the top 5 match an active federal or state record, checked on 2026-11-04.

The top-ranked clinical laboratories serving Napa County, CA are Medusa Pathology Inc, Neurovations, Gcc Laboratory, Redwood Toxicology Laboratory, Inc and Life Technologies Clinical Services Lab. The full ranked list, with the official records each provider matched, is on this page.

5 of the top 5 match an active official record: Medusa Pathology Inc (Centers for Medicare & Medicaid Services), Neurovations (Centers for Medicare & Medicaid Services), Gcc Laboratory (Centers for Medicare & Medicaid Services), Redwood Toxicology Laboratory, Inc (Centers for Medicare & Medicaid Services) and Life Technologies Clinical Services Lab (Centers for Medicare & Medicaid Services). 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.