Clinical & Reference Laboratories in Washington County, OR

We list 30 clinical laboratories serving Washington County, OR: 10 based there and 20 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 Washington County, OR are Cascade Pathology Services Meridian Park, Curtis T Thompson Md & Associates, Medsurg Pathology Associates On Durham, Molecular Vision Laboratory and Rhein Consulting Laboratories. 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: Cascade Pathology Services Meridian Park (Centers for Medicare & Medicaid Services), Curtis T Thompson Md & Associates (Centers for Medicare & Medicaid Services), Medsurg Pathology Associates On Durham (Centers for Medicare & Medicaid Services), Molecular Vision Laboratory (Centers for Medicare & Medicaid Services) and Rhein Consulting Laboratories (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.