#1Dominion Diagnostics, LLC
Based in North Kingstown, RI
Clinical & Reference Laboratories in Washington County, RI
The top-ranked clinical laboratories serving Washington County, RI are Dominion Diagnostics, LLC, Health Outlook Corporation and Pfizer Pharmacogenomics Lab. We list 22 clinical laboratories serving Washington County, RI. 22 of the providers shown match an active record from Centers for Medicare & Medicaid Services, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Clinical & Reference Laboratories serving Washington County, RI. 22 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked clinical laboratories for Washington County
#2Health Outlook Corporation
Serves this area from Groton, CT (24 mi)#3Pfizer Pharmacogenomics Lab
Serves this area from Groton, CT (24 mi)#4Quest Diagnostics LLC
Serves this area from New London, CT (25 mi)#5Quest Diagnostics
Serves this area from Norwich, CT (27 mi)#6East Side Clinical Laboratory, Inc
Serves this area from Norwich, CT (27 mi)#7Quest Diagnostics LLC
Serves this area from Norwich, CT (27 mi)#8Quest Diagnostics LLC
Serves this area from Windham, CT (39 mi)#9Hampton Pathology, PC
Serves this area from Southampton, NY (53 mi)#10Prime Pathology Laboratory
Serves this area from Southampton, NY (53 mi)
12 more providers serving this area
- North Shore Hematology-oncology Associates, PC, Terryville, NY (82 mi)
- Medpath Diagnostics, Inc, Holtsville, NY (83 mi)
- Sinapath, Holtsville, NY (83 mi)
- Long Island Pathology Laboratory, Inc, East Setauket, NY (84 mi)
- Applied Dna Clinical Labs, LLC, Stony Brook University, NY (85 mi)
- Stony Brook Pathologists Ufpc Laboratory, Stony Brook University, NY (85 mi)
- Fast Lab Corp, Holtsville, NY (85 mi)
- Schwarz And Ammirati Medical Associates, North Patchogue, NY (85 mi)
- Cytogenx Corp, Stony Brook, NY (86 mi)
- Stony Brook Pathologists 1320 Laboratory, Stony Brook, NY (86 mi)
- Stoneview Pathology Medical Service PLLC, St. James, NY (87 mi)
- Mcclain Laboratories LLC, Smithtown, NY (90 mi)
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Frequently asked questions
How many clinical laboratories serve Washington County?
We list 22 clinical laboratories serving Washington County, RI: 1 based there and 21 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which clinical laboratories serve Washington County?
The top-ranked clinical laboratories serving Washington County, RI are Dominion Diagnostics, LLC, Health Outlook Corporation, Pfizer Pharmacogenomics Lab, Quest Diagnostics LLC and Quest Diagnostics. The full ranked list, with the official records each provider matched, is on this page.
Which clinical laboratories serving Washington County are verified against official records?
10 of the top 10 match an active official record: Dominion Diagnostics, LLC (Centers for Medicare & Medicaid Services), Health Outlook Corporation (Centers for Medicare & Medicaid Services), Pfizer Pharmacogenomics Lab (Centers for Medicare & Medicaid Services), Quest Diagnostics LLC (Centers for Medicare & Medicaid Services) and Quest Diagnostics (Centers for Medicare & Medicaid Services), and 5 more on this page. Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"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.
What does CLIA certification mean?
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.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .
Cities in Washington County
Communities served
Westerly, Narragansett, Wakefield-Peace Dale, Hopkinton, Richmond, Charlestown, Kingston, Exeter, Narragansett Pier, Hope Valley, Ashaway, Bradford, New Shoreham, Carolina, Weekapaug, Misquamicut, Quonochontaug, Wyoming, Watch Hill