Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Quest Diagnostics LLC

Organization Clinical Medical Laboratory · NPI 1083205942

Quest Diagnostics LLC is a Clinical Medical Laboratory in Chicago, Illinois. Registered with an NPI since 2021.

In the registry since
2021
What do these letters mean?
LLC — Limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

3924 W Fullerton Ave
Chicago, IL 60647-2228
Phone: (773) 276-2229
Fax: (773) 276-2190
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Medical Laboratory (primary) Taxonomy 291U00000X

Record details

NPI number1083205942
Entity typeOrganization (Type 2)
Organization subpartYes
Parent organizationQuest Diagnostics Incorporated
Authorized official Charles Bowles — Vice President · (610) 454-6000
NPI enumeratedFebruary 2, 2021
Last updated in NPPESFebruary 2, 2021
Certification dateFebruary 2, 2021
Mailing address1201 S Collegeville Rd, Collegeville, PA 19426-2998

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