#1Quest Diagnostics
Serves this area from Los Angeles, CA (8 mi)
Clinical & Reference Laboratories in Simi Valley, CA
The top-ranked clinical laboratories serving Simi Valley, CA are Quest Diagnostics, Quest Diagnostics and Quest Diagnostics. We list 166 clinical laboratories serving Simi Valley, CA. 30 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 Simi Valley, CA (Ventura County). 166 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 Simi Valley
#2Quest Diagnostics
Serves this area from Los Angeles, CA (8 mi)#3Quest Diagnostics
Serves this area from Los Angeles, CA (8 mi)#4Lan Su Dmd Phd
Serves this area from Westlake Village, CA (8 mi)#5Alexanian Medical Laboratories
Serves this area from Agoura Hills, CA (8 mi)#6Interscope Pathology Medical Group
Serves this area from Westlake Village, CA (8 mi)#7Earlydiagnostics Inc
Serves this area from Agoura Hills, CA (9 mi)#8Malibu Pathology
Serves this area from Agoura Hills, CA (9 mi)#9Pacgenomics Inc
Serves this area from Agoura Hills, CA (9 mi)#10Sonic Diagnostic Laboratory Inc
Serves this area from Los Angeles, CA (9 mi)
20 more providers serving this area
- Gemini Diagnostics, Thousand Oaks, CA (9 mi)
- Esoterix-inc, Calabasas, CA (9 mi)
- Pacific Toxicology Laboratories, Los Angeles, CA (9 mi)
- Topa Diagnostics, CA
- Transpath Inc, Los Angeles, CA (9 mi)
- Conejo Dermatology, Thousand Oaks, CA (10 mi)
- Payam Abrishami Md Inc, CA
- Huntington Reproductive Center, Lake Sherwood, CA (12 mi)
- Los Angeles Ventura Affiliated, Los Angeles, CA (12 mi)
- Unity Lab Solutions, Inc, Los Angeles, CA (12 mi)
- Doctornow, Los Angeles, CA (12 mi)
- Biocollections Worldwide Inc, Los Angeles, CA (13 mi)
- Charles River Laboratories, Los Angeles, CA (14 mi)
- Primex Clinical Laboratories, Inc, Los Angeles, CA (15 mi)
- Research & Development Institute, Los Angeles, CA (15 mi)
- Medical Electronic Systems, Los Angeles, CA (15 mi)
- Pasteur Inc DBA Sinai Labs, Los Angeles, CA (16 mi)
- Care Bio Clinical Laboratory, Los Angeles, CA (17 mi)
- Diamed Laboratory Services Inc, Los Angeles, CA (18 mi)
- Hrc Fertility - Encino, Los Angeles, CA (18 mi)
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Frequently asked questions
How many clinical laboratories serve Simi Valley?
We list 166 clinical laboratories serving Simi Valley, CA: 0 based there and 166 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 Simi Valley?
The top-ranked clinical laboratories serving Simi Valley, CA are Quest Diagnostics, Quest Diagnostics, Quest Diagnostics, Lan Su Dmd Phd and Alexanian Medical Laboratories. The full ranked list, with the official records each provider matched, is on this page.
Which clinical laboratories serving Simi Valley are verified against official records?
10 of the top 10 match an active official record: Quest Diagnostics (Centers for Medicare & Medicaid Services), Quest Diagnostics (Centers for Medicare & Medicaid Services), Quest Diagnostics (Centers for Medicare & Medicaid Services), Lan Su Dmd Phd (Centers for Medicare & Medicaid Services) and Alexanian Medical Laboratories (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 .